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<!-- DFIN ActiveDisclosure(SM) XBRL Linkbase Document - http://www.dfinsolutions.com/ -->
<!-- Creation Date      : 2020-11-05T23:24:58.9454100+00:00 -->
<!-- Version            : 5.0.1.513 -->
<!-- Package ID         : 1a8cda49736a4c229942f2afba6c6a12 -->
<!-- Copyright (c) 2020 Donnelley Financial Solutions, Inc. All Rights Reserved. -->
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    <link:loc xlink:href="sf-20200930.xsd#sf_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughThreeYearsFairValue" xlink:type="locator" xlink:label="sf_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughThreeYearsFairValue" />
    <link:label xml:lang="en-US" xlink:label="sf_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughThreeYearsFairValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Available for sale securities debt maturities after one through three years fair value.</link:label>
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    <link:label xml:lang="en-US" xlink:label="sf_AvailableForSaleSecuritiesDebtMaturitiesAfterThreeThroughFiveYearsFairValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Available for sale securities debt maturities after three through five years fair value.</link:label>
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    <link:loc xlink:href="sf-20200930.xsd#sf_LoansAndLeasesPayableReceivableLoansInProcess" xlink:type="locator" xlink:label="sf_LoansAndLeasesPayableReceivableLoansInProcess" />
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    <link:loc xlink:href="sf-20200930.xsd#sf_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFour" xlink:type="locator" xlink:label="sf_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFour" />
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    <link:loc xlink:href="sf-20200930.xsd#sf_RevenueFromContractWithCustomerExcludingOtherSegmentRevenueAndAssessedTax" xlink:type="locator" xlink:label="sf_RevenueFromContractWithCustomerExcludingOtherSegmentRevenueAndAssessedTax" />
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    <link:loc xlink:href="sf-20200930.xsd#sf_OtherRevenues" xlink:type="locator" xlink:label="sf_OtherRevenues" />
    <link:label xml:lang="en-US" xlink:label="sf_OtherRevenues_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Other revenues.</link:label>
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    <link:label xml:lang="en-US" xlink:label="dei_CoverAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Cover [Abstract]</link:label>
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    <link:label xml:lang="en-US" xlink:label="dei_DocumentInformationTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Information [Table]</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementClassOfStockAxis" xlink:type="locator" xlink:label="us-gaap_StatementClassOfStockAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StatementClassOfStockAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Class of Stock</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_ClassOfStockDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Class of Stock</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_ClassOfStockDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Class Of Stock [Domain]</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common Stock [Member]</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock [Member]</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_DepositorySharesEachRepresentingOneByThousandthInterestInShareOfSixPointTwoFivePercentageNonCumulativePreferredStockSeriesAMember" xlink:type="locator" xlink:label="sf_DepositorySharesEachRepresentingOneByThousandthInterestInShareOfSixPointTwoFivePercentageNonCumulativePreferredStockSeriesAMember" />
    <link:label xml:lang="en-US" xlink:label="sf_DepositorySharesEachRepresentingOneByThousandthInterestInShareOfSixPointTwoFivePercentageNonCumulativePreferredStockSeriesAMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Depository shares, each representing one by thousandth interest in a share of six point two five percentage non-cumulative preferred stock, series A.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_DepositorySharesEachRepresentingOneByThousandthInterestInShareOfSixPointTwoFivePercentageNonCumulativePreferredStockSeriesAMember" xlink:to="sf_DepositorySharesEachRepresentingOneByThousandthInterestInShareOfSixPointTwoFivePercentageNonCumulativePreferredStockSeriesAMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="sf_DepositorySharesEachRepresentingOneByThousandthInterestInShareOfSixPointTwoFivePercentageNonCumulativePreferredStockSeriesAMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Depository Shares, each representing 1/1,000th interest in a share of 6.25% Non-Cumulative Preferred Stock, Series A [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_DepositorySharesEachRepresentingOneByThousandthInterestInShareOfSixPointTwoFivePercentageNonCumulativePreferredStockSeriesAMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Depository Shares Each Representing One By Thousandth Interest In Share Of Six Point Two Five Percentage Non Cumulative Preferred Stock Series A [Member]</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_DepositorySharesEachRepresentingOneByThousandthInterestInShareOfSixPointTwoFivePercentageNonCumulativePreferredStockSeriesBMember" xlink:type="locator" xlink:label="sf_DepositorySharesEachRepresentingOneByThousandthInterestInShareOfSixPointTwoFivePercentageNonCumulativePreferredStockSeriesBMember" />
    <link:label xml:lang="en-US" xlink:label="sf_DepositorySharesEachRepresentingOneByThousandthInterestInShareOfSixPointTwoFivePercentageNonCumulativePreferredStockSeriesBMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Depository shares, each representing one by thousandth interest in a share of six point two five percentage non-cumulative preferred stock, series B.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_DepositorySharesEachRepresentingOneByThousandthInterestInShareOfSixPointTwoFivePercentageNonCumulativePreferredStockSeriesBMember" xlink:to="sf_DepositorySharesEachRepresentingOneByThousandthInterestInShareOfSixPointTwoFivePercentageNonCumulativePreferredStockSeriesBMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="sf_DepositorySharesEachRepresentingOneByThousandthInterestInShareOfSixPointTwoFivePercentageNonCumulativePreferredStockSeriesBMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Depository Shares, each representing 1/1,000th interest in a share of 6.25% Non-Cumulative Preferred Stock, Series B [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_DepositorySharesEachRepresentingOneByThousandthInterestInShareOfSixPointTwoFivePercentageNonCumulativePreferredStockSeriesBMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Depository Shares Each Representing One By Thousandth Interest In Share Of Six Point Two Five Percentage Non Cumulative Preferred Stock Series B [Member]</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_DepositorySharesEachRepresentingOneByThousandthInterestInShareOfSixPointOneTwoFivePercentageNonCumulativePreferredStockSeriesCPreferredStockMember" xlink:type="locator" xlink:label="sf_DepositorySharesEachRepresentingOneByThousandthInterestInShareOfSixPointOneTwoFivePercentageNonCumulativePreferredStockSeriesCPreferredStockMember" />
    <link:label xml:lang="en-US" xlink:label="sf_DepositorySharesEachRepresentingOneByThousandthInterestInShareOfSixPointOneTwoFivePercentageNonCumulativePreferredStockSeriesCPreferredStockMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Depository shares, each representing one by thousandth interest in a share of six point one two five percentage non-cumulative preferred stock, series C.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_DepositorySharesEachRepresentingOneByThousandthInterestInShareOfSixPointOneTwoFivePercentageNonCumulativePreferredStockSeriesCPreferredStockMember" xlink:to="sf_DepositorySharesEachRepresentingOneByThousandthInterestInShareOfSixPointOneTwoFivePercentageNonCumulativePreferredStockSeriesCPreferredStockMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="sf_DepositorySharesEachRepresentingOneByThousandthInterestInShareOfSixPointOneTwoFivePercentageNonCumulativePreferredStockSeriesCPreferredStockMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Depository Shares, each representing 1/1,000th interest in a share of 6.125% Non-Cumulative Preferred Stock, Series C [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_DepositorySharesEachRepresentingOneByThousandthInterestInShareOfSixPointOneTwoFivePercentageNonCumulativePreferredStockSeriesCPreferredStockMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Depository Shares Each Representing One By Thousandth Interest In Share Of Six Point One Two Five Percentage Non Cumulative Preferred Stock Series C Preferred Stock [Member]</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_SeniorNotes520Due2047Member" xlink:type="locator" xlink:label="sf_SeniorNotes520Due2047Member" />
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    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_DocumentInformationLineItems" xlink:type="locator" xlink:label="dei_DocumentInformationLineItems" />
    <link:label xml:lang="en-US" xlink:label="dei_DocumentInformationLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Information [Line Items]</link:label>
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    <link:label xml:lang="en-US" xlink:label="dei_DocumentType_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Document Type</link:label>
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    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_Security12bTitle" xlink:type="locator" xlink:label="dei_Security12bTitle" />
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    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityFileNumber" xlink:type="locator" xlink:label="dei_EntityFileNumber" />
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    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityIncorporationStateCountryCode" xlink:type="locator" xlink:label="dei_EntityIncorporationStateCountryCode" />
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    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityTaxIdentificationNumber" xlink:type="locator" xlink:label="dei_EntityTaxIdentificationNumber" />
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    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressAddressLine1" xlink:type="locator" xlink:label="dei_EntityAddressAddressLine1" />
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    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressPostalZipCode" xlink:type="locator" xlink:label="dei_EntityAddressPostalZipCode" />
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    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_DocumentQuarterlyReport" xlink:type="locator" xlink:label="dei_DocumentQuarterlyReport" />
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    <link:label xml:lang="en-US" xlink:label="us-gaap_ReceivablesFromBrokersDealersAndClearingOrganizations_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Brokers, dealers, and clearing organizations</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_SecuritiesPurchasedUnderAgreementsToResell_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Securities purchased under agreements to resell</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_TradingSecurities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Financial instruments owned, at fair value</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_AvailableForSaleSecurities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Available-for-sale securities, at fair value</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LoansAndLeasesReceivableNetReportedAmountAbstract" xlink:type="locator" xlink:label="us-gaap_LoansAndLeasesReceivableNetReportedAmountAbstract" />
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    <link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockSharesAuthorized_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock, shares authorized</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockSharesAuthorized" xlink:to="us-gaap_CommonStockSharesAuthorized_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockSharesAuthorized_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock Shares Authorized</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommonStockSharesIssued" xlink:type="locator" xlink:label="us-gaap_CommonStockSharesIssued" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock, shares issued</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockSharesIssued" xlink:to="us-gaap_CommonStockSharesIssued_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock Shares Issued</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TreasuryStockShares" xlink:type="locator" xlink:label="us-gaap_TreasuryStockShares" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TreasuryStockShares_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Treasury stock, shares</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TreasuryStockShares" xlink:to="us-gaap_TreasuryStockShares_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TreasuryStockShares_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Treasury Stock Shares</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeStatementAbstract" xlink:type="locator" xlink:label="us-gaap_IncomeStatementAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncomeStatementAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Income Statement [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeStatementAbstract" xlink:to="us-gaap_IncomeStatementAbstract_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementTable" xlink:type="locator" xlink:label="us-gaap_StatementTable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StatementTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Statement [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementTable" xlink:to="us-gaap_StatementTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StatementTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Statement [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ProductOrServiceAxis" xlink:type="locator" xlink:label="srt_ProductOrServiceAxis" />
    <link:label xml:lang="en-US" xlink:label="srt_ProductOrServiceAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Product and Service</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_ProductOrServiceAxis" xlink:to="srt_ProductOrServiceAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_ProductOrServiceAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Product Or Service [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ProductsAndServicesDomain" xlink:type="locator" xlink:label="srt_ProductsAndServicesDomain" />
    <link:label xml:lang="en-US" xlink:label="srt_ProductsAndServicesDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Product and Service</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_ProductsAndServicesDomain" xlink:to="srt_ProductsAndServicesDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_ProductsAndServicesDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Products And Services [Domain]</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_CommissionsMember" xlink:type="locator" xlink:label="sf_CommissionsMember" />
    <link:label xml:lang="en-US" xlink:label="sf_CommissionsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Commissions.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_CommissionsMember" xlink:to="sf_CommissionsMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="sf_CommissionsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Commissions [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_CommissionsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Commissions [Member]</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_InvestmentBankingMember" xlink:type="locator" xlink:label="sf_InvestmentBankingMember" />
    <link:label xml:lang="en-US" xlink:label="sf_InvestmentBankingMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Investment banking.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_InvestmentBankingMember" xlink:to="sf_InvestmentBankingMember_lbl" />
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    <link:label xml:lang="en-US" xlink:label="sf_InvestmentBankingMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Investment Banking [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InvestmentAdvisoryManagementAndAdministrativeServiceMember" xlink:type="locator" xlink:label="us-gaap_InvestmentAdvisoryManagementAndAdministrativeServiceMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InvestmentAdvisoryManagementAndAdministrativeServiceMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Asset Management and Service Fees [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentAdvisoryManagementAndAdministrativeServiceMember" xlink:to="us-gaap_InvestmentAdvisoryManagementAndAdministrativeServiceMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InvestmentAdvisoryManagementAndAdministrativeServiceMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Investment Advisory Management And Administrative Service [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementLineItems" xlink:type="locator" xlink:label="us-gaap_StatementLineItems" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StatementLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Statement [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_StatementLineItems_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StatementLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Statement [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RevenuesAbstract" xlink:type="locator" xlink:label="us-gaap_RevenuesAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RevenuesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Revenues:</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RevenuesAbstract" xlink:to="us-gaap_RevenuesAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RevenuesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Revenues [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax" xlink:type="locator" xlink:label="us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Revenue from contracts with customers</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PrincipalTransactionsRevenue" xlink:type="locator" xlink:label="us-gaap_PrincipalTransactionsRevenue" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PrincipalTransactionsRevenue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Principal transactions</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PrincipalTransactionsRevenue" xlink:to="us-gaap_PrincipalTransactionsRevenue_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PrincipalTransactionsRevenue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Principal Transactions Revenue</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InterestAndDividendIncomeOperating" xlink:type="locator" xlink:label="us-gaap_InterestAndDividendIncomeOperating" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestAndDividendIncomeOperating_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestAndDividendIncomeOperating_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Interest And Dividend Income Operating</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NoninterestIncomeOtherOperatingIncome" xlink:type="locator" xlink:label="us-gaap_NoninterestIncomeOtherOperatingIncome" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NoninterestIncomeOtherOperatingIncome_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other income</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_NoninterestIncomeOtherOperatingIncome_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Noninterest Income Other Operating Income</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_Revenues" xlink:type="locator" xlink:label="us-gaap_Revenues" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_Revenues_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total revenues</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_Revenues_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Revenues</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InterestExpense" xlink:type="locator" xlink:label="us-gaap_InterestExpense" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest expense</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestExpense" xlink:to="us-gaap_InterestExpense_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Interest Expense</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RevenuesNetOfInterestExpense" xlink:type="locator" xlink:label="us-gaap_RevenuesNetOfInterestExpense" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RevenuesNetOfInterestExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net revenues</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_RevenuesNetOfInterestExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Revenues Net Of Interest Expense</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NoninterestExpenseAbstract" xlink:type="locator" xlink:label="us-gaap_NoninterestExpenseAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NoninterestExpenseAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Non-interest expenses:</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NoninterestExpenseAbstract" xlink:to="us-gaap_NoninterestExpenseAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NoninterestExpenseAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Noninterest Expense [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LaborAndRelatedExpense" xlink:type="locator" xlink:label="us-gaap_LaborAndRelatedExpense" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LaborAndRelatedExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Compensation and benefits</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_LaborAndRelatedExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Labor And Related Expense</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OccupancyNet" xlink:type="locator" xlink:label="us-gaap_OccupancyNet" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OccupancyNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Occupancy and equipment rental</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OccupancyNet" xlink:to="us-gaap_OccupancyNet_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OccupancyNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Occupancy Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommunicationsAndInformationTechnology" xlink:type="locator" xlink:label="us-gaap_CommunicationsAndInformationTechnology" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CommunicationsAndInformationTechnology_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Communications and office supplies</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_CommunicationsAndInformationTechnology_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Communications And Information Technology</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_ProvisionForOtherCreditLosses_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Provision for credit losses</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherCostAndExpenseOperating" xlink:type="locator" xlink:label="us-gaap_OtherCostAndExpenseOperating" />
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    <link:label xml:lang="en-US" xlink:label="us-gaap_DividendsCommonStockCash_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Dividends declared, Common</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DividendsCommonStockCash" xlink:to="us-gaap_DividendsCommonStockCash_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DividendsCommonStockCash_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Dividends Common Stock Cash</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DividendsPreferredStockCash" xlink:type="locator" xlink:label="us-gaap_DividendsPreferredStockCash" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DividendsPreferredStockCash_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Dividends declared, Preferred</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DividendsPreferredStockCash" xlink:to="us-gaap_DividendsPreferredStockCash_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DividendsPreferredStockCash_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Dividends Preferred Stock Cash</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueNewIssues" xlink:type="locator" xlink:label="us-gaap_StockIssuedDuringPeriodValueNewIssues" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StockIssuedDuringPeriodValueNewIssues_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of preferred stock</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodValueNewIssues" xlink:to="us-gaap_StockIssuedDuringPeriodValueNewIssues_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StockIssuedDuringPeriodValueNewIssues_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period Value New Issues</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesNewIssues" xlink:type="locator" xlink:label="us-gaap_StockIssuedDuringPeriodSharesNewIssues" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StockIssuedDuringPeriodSharesNewIssues_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of common stock</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodSharesNewIssues" xlink:to="us-gaap_StockIssuedDuringPeriodSharesNewIssues_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StockIssuedDuringPeriodSharesNewIssues_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period Shares New Issues</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DividendsShareBasedCompensationCash" xlink:type="locator" xlink:label="us-gaap_DividendsShareBasedCompensationCash" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DividendsShareBasedCompensationCash_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Dividends declared to equity-award holders</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DividendsShareBasedCompensationCash" xlink:to="us-gaap_DividendsShareBasedCompensationCash_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DividendsShareBasedCompensationCash_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Dividends Share Based Compensation Cash</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Unrealized gains on securities, net of tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_UnrealizedGainLossOnCashFlowHedgingInstruments" xlink:type="locator" xlink:label="us-gaap_UnrealizedGainLossOnCashFlowHedgingInstruments" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_UnrealizedGainLossOnCashFlowHedgingInstruments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unrealized gains/(losses) on cash flow hedging activities, net of tax</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_UnrealizedGainLossOnCashFlowHedgingInstruments" xlink:to="us-gaap_UnrealizedGainLossOnCashFlowHedgingInstruments_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_UnrealizedGainLossOnCashFlowHedgingInstruments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Unrealized Gain Loss On Cash Flow Hedging Instruments</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Foreign currency translation adjustment, net of tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueOther" xlink:type="locator" xlink:label="us-gaap_StockIssuedDuringPeriodValueOther" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StockIssuedDuringPeriodValueOther_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodValueOther" xlink:to="us-gaap_StockIssuedDuringPeriodValueOther_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StockIssuedDuringPeriodValueOther_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period Value Other</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance" xlink:type="locator" xlink:label="us-gaap_NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Capital contributions from non-controlling interest holders</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance" xlink:to="us-gaap_NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Noncontrolling Interest Increase From Subsidiary Equity Issuance</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders" xlink:type="locator" xlink:label="us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Distributions to non-controlling interest holders</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders" xlink:to="us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Minority Interest Decrease From Distributions To Noncontrolling Interest Holders</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NoncontrollingInterestDecreaseFromDeconsolidation" xlink:type="locator" xlink:label="us-gaap_NoncontrollingInterestDecreaseFromDeconsolidation" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NoncontrollingInterestDecreaseFromDeconsolidation_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deconsolidation of non-controlling interest</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NoncontrollingInterestDecreaseFromDeconsolidation" xlink:to="us-gaap_NoncontrollingInterestDecreaseFromDeconsolidation_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NoncontrollingInterestDecreaseFromDeconsolidation_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Noncontrolling Interest Decrease From Deconsolidation</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Balance, end of period</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_AmortizationOfLoansAndAdvancesToFinancialAdvisorsAndOtherEmployees" xlink:type="locator" xlink:label="sf_AmortizationOfLoansAndAdvancesToFinancialAdvisorsAndOtherEmployees" />
    <link:label xml:lang="en-US" xlink:label="sf_AmortizationOfLoansAndAdvancesToFinancialAdvisorsAndOtherEmployees_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Amortization of loans and advances to financial advisors and other employees.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_AmortizationOfLoansAndAdvancesToFinancialAdvisorsAndOtherEmployees" xlink:to="sf_AmortizationOfLoansAndAdvancesToFinancialAdvisorsAndOtherEmployees_lbl" />
    <link:loc xlink:href="sf-20200930.xsd#sf_ChangeInSecuritiesPurchasedUnderAgreementsToResell" xlink:type="locator" xlink:label="sf_ChangeInSecuritiesPurchasedUnderAgreementsToResell" />
    <link:label xml:lang="en-US" xlink:label="sf_ChangeInSecuritiesPurchasedUnderAgreementsToResell_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Change in securities purchased under agreements to resell.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_ChangeInSecuritiesPurchasedUnderAgreementsToResell" xlink:to="sf_ChangeInSecuritiesPurchasedUnderAgreementsToResell_lbl" />
    <link:loc xlink:href="sf-20200930.xsd#sf_IncreaseDecreaseInDraftsPayable" xlink:type="locator" xlink:label="sf_IncreaseDecreaseInDraftsPayable" />
    <link:label xml:lang="en-US" xlink:label="sf_IncreaseDecreaseInDraftsPayable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Increase (decrease) in drafts payable.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_IncreaseDecreaseInDraftsPayable" xlink:to="sf_IncreaseDecreaseInDraftsPayable_lbl" />
    <link:loc xlink:href="sf-20200930.xsd#sf_ProceedsFromRepaymentsOfFederalHomeLoanBankAdvancesNet" xlink:type="locator" xlink:label="sf_ProceedsFromRepaymentsOfFederalHomeLoanBankAdvancesNet" />
    <link:label xml:lang="en-US" xlink:label="sf_ProceedsFromRepaymentsOfFederalHomeLoanBankAdvancesNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Proceeds from (repayments) of federal home loan bank advances, net.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_ProceedsFromRepaymentsOfFederalHomeLoanBankAdvancesNet" xlink:to="sf_ProceedsFromRepaymentsOfFederalHomeLoanBankAdvancesNet_lbl" />
    <link:loc xlink:href="sf-20200930.xsd#sf_PaymentOfContingentConsideration" xlink:type="locator" xlink:label="sf_PaymentOfContingentConsideration" />
    <link:label xml:lang="en-US" xlink:label="sf_PaymentOfContingentConsideration_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Payment of contingent consideration.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_PaymentOfContingentConsideration" xlink:to="sf_PaymentOfContingentConsideration_lbl" />
    <link:loc xlink:href="sf-20200930.xsd#sf_PaymentsOfDividendsCommonStockAndEquityAwardHolders" xlink:type="locator" xlink:label="sf_PaymentsOfDividendsCommonStockAndEquityAwardHolders" />
    <link:label xml:lang="en-US" xlink:label="sf_PaymentsOfDividendsCommonStockAndEquityAwardHolders_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Payments of dividends common stock and equity award holders.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_PaymentsOfDividendsCommonStockAndEquityAwardHolders" xlink:to="sf_PaymentsOfDividendsCommonStockAndEquityAwardHolders_lbl" />
    <link:loc xlink:href="sf-20200930.xsd#sf_PaymentToEmployeesUponSettlementOfEquityAwards" xlink:type="locator" xlink:label="sf_PaymentToEmployeesUponSettlementOfEquityAwards" />
    <link:label xml:lang="en-US" xlink:label="sf_PaymentToEmployeesUponSettlementOfEquityAwards_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Cash paid to employees upon settlement of equity awards.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_PaymentToEmployeesUponSettlementOfEquityAwards" xlink:to="sf_PaymentToEmployeesUponSettlementOfEquityAwards_lbl" />
    <link:loc xlink:href="sf-20200930.xsd#sf_ProceedsFromDispositionOfBusiness" xlink:type="locator" xlink:label="sf_ProceedsFromDispositionOfBusiness" />
    <link:label xml:lang="en-US" xlink:label="sf_ProceedsFromDispositionOfBusiness_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Proceeds from disposition of business.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_ProceedsFromDispositionOfBusiness" xlink:to="sf_ProceedsFromDispositionOfBusiness_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementOfCashFlowsAbstract" xlink:type="locator" xlink:label="us-gaap_StatementOfCashFlowsAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StatementOfCashFlowsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Statement Of Cash Flows [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementOfCashFlowsAbstract" xlink:to="us-gaap_StatementOfCashFlowsAbstract_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:type="locator" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash Flows From Operating Activities:</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Net Cash Provided By Used In Operating Activities [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:type="locator" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Adjustments to reconcile net income to net cash provided by operating activities:</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DepreciationAmortizationAndAccretionNet" xlink:type="locator" xlink:label="us-gaap_DepreciationAmortizationAndAccretionNet" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DepreciationAmortizationAndAccretionNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Depreciation and amortization</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DepreciationAmortizationAndAccretionNet" xlink:to="us-gaap_DepreciationAmortizationAndAccretionNet_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DepreciationAmortizationAndAccretionNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Depreciation Amortization And Accretion Net</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_AmortizationOfLoansAndAdvancesToFinancialAdvisorsAndOtherEmployees_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amortization of loans and advances to financial advisors and other employees</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_AmortizationOfLoansAndAdvancesToFinancialAdvisorsAndOtherEmployees_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Amortization Of Loans And Advances To Financial Advisors And Other Employees</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments" xlink:type="locator" xlink:label="us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Amortization of premium on investment portfolio</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments" xlink:to="us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Accretion Amortization Of Discounts And Premiums Investments</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ProvisionForLoanLeaseAndOtherLosses" xlink:type="locator" xlink:label="us-gaap_ProvisionForLoanLeaseAndOtherLosses" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ProvisionForLoanLeaseAndOtherLosses_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Provision for credit losses and allowance for loans and advances to financial advisors and other employees</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProvisionForLoanLeaseAndOtherLosses" xlink:to="us-gaap_ProvisionForLoanLeaseAndOtherLosses_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ProvisionForLoanLeaseAndOtherLosses_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Provision For Loan Lease And Other Losses</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AmortizationOfIntangibleAssets" xlink:type="locator" xlink:label="us-gaap_AmortizationOfIntangibleAssets" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AmortizationOfIntangibleAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amortization of intangible assets</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit" xlink:type="locator" xlink:label="us-gaap_DeferredIncomeTaxExpenseBenefit" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DeferredIncomeTaxExpenseBenefit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred income taxes</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AllocatedShareBasedCompensationExpense" xlink:type="locator" xlink:label="us-gaap_AllocatedShareBasedCompensationExpense" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AllocatedShareBasedCompensationExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock-based compensation</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_AllocatedShareBasedCompensationExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Allocated Share Based Compensation Expense</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_GainLossOnInvestments" xlink:type="locator" xlink:label="us-gaap_GainLossOnInvestments" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_GainLossOnInvestments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">(Gains)/losses on sale of investments</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherNoncashIncomeExpense" xlink:type="locator" xlink:label="us-gaap_OtherNoncashIncomeExpense" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherNoncashIncomeExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Other, net</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherNoncashIncomeExpense" xlink:to="us-gaap_OtherNoncashIncomeExpense_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherNoncashIncomeExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Other Noncash Income Expense</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:type="locator" xlink:label="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Decrease/(increase) in operating assets, net of assets acquired:</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:to="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Increase Decrease In Operating Capital [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncreaseDecreaseInReceivablesAbstract" xlink:type="locator" xlink:label="us-gaap_IncreaseDecreaseInReceivablesAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInReceivablesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Receivables:</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInReceivablesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Increase Decrease In Receivables [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncreaseDecreaseInContractWithCustomerAsset" xlink:type="locator" xlink:label="us-gaap_IncreaseDecreaseInContractWithCustomerAsset" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInContractWithCustomerAsset_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Brokerage clients</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInContractWithCustomerAsset" xlink:to="us-gaap_IncreaseDecreaseInContractWithCustomerAsset_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInContractWithCustomerAsset_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Increase Decrease In Contract With Customer Asset</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncreaseDecreaseInBrokerageReceivables" xlink:type="locator" xlink:label="us-gaap_IncreaseDecreaseInBrokerageReceivables" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInBrokerageReceivables_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Brokers, dealers, and clearing organizations</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInBrokerageReceivables_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Increase Decrease In Brokerage Receivables</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_ChangeInSecuritiesPurchasedUnderAgreementsToResell_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Securities purchased under agreements to resell</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_ChangeInSecuritiesPurchasedUnderAgreementsToResell_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Change In Securities Purchased Under Agreements To Resell</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncreaseDecreaseInTradingSecurities" xlink:type="locator" xlink:label="us-gaap_IncreaseDecreaseInTradingSecurities" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInTradingSecurities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Financial instruments owned, including those pledged</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInTradingSecurities" xlink:to="us-gaap_IncreaseDecreaseInTradingSecurities_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInTradingSecurities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Increase Decrease In Trading Securities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PaymentsForOriginationOfMortgageLoansHeldForSale" xlink:type="locator" xlink:label="us-gaap_PaymentsForOriginationOfMortgageLoansHeldForSale" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PaymentsForOriginationOfMortgageLoansHeldForSale_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Loans originated as held for sale</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_PaymentsForOriginationOfMortgageLoansHeldForSale_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Payments For Origination Of Mortgage Loans Held For Sale</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ProceedsFromSaleOfMortgageLoansHeldForSale" xlink:type="locator" xlink:label="us-gaap_ProceedsFromSaleOfMortgageLoansHeldForSale" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromSaleOfMortgageLoansHeldForSale_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from mortgages held for sale</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingAssets" xlink:type="locator" xlink:label="us-gaap_IncreaseDecreaseInOtherOperatingAssets" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInOtherOperatingAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Other assets</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncreaseDecreaseInOperatingLiabilitiesAbstract" xlink:type="locator" xlink:label="us-gaap_IncreaseDecreaseInOperatingLiabilitiesAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInOperatingLiabilitiesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Increase/(decrease) in operating liabilities, net of liabilities assumed:</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncreaseDecreaseInContractWithCustomerLiability" xlink:type="locator" xlink:label="us-gaap_IncreaseDecreaseInContractWithCustomerLiability" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInContractWithCustomerLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Brokerage clients</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncreaseDecreaseInPayablesToBrokerDealers" xlink:type="locator" xlink:label="us-gaap_IncreaseDecreaseInPayablesToBrokerDealers" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInPayablesToBrokerDealers_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Brokers, dealers, and clearing organizations</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInPayablesToBrokerDealers_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Increase Decrease In Payables To Broker Dealers</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_IncreaseDecreaseInDraftsPayable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Drafts</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncreaseDecreaseInFinancialInstrumentsSoldNotYetPurchased" xlink:type="locator" xlink:label="us-gaap_IncreaseDecreaseInFinancialInstrumentsSoldNotYetPurchased" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInFinancialInstrumentsSoldNotYetPurchased_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Financial instruments sold, but not yet purchased</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncreaseDecreaseInOtherAccruedLiabilities" xlink:type="locator" xlink:label="us-gaap_IncreaseDecreaseInOtherAccruedLiabilities" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInOtherAccruedLiabilities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other liabilities and accrued expenses</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:type="locator" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities" />
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    <link:loc xlink:href="sf-20200930.xsd#sf_UnitsNetOfForfeitures" xlink:type="locator" xlink:label="sf_UnitsNetOfForfeitures" />
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    <link:loc xlink:href="sf-20200930.xsd#sf_CorporateEquitySecuritiesMember" xlink:type="locator" xlink:label="sf_CorporateEquitySecuritiesMember" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_USStatesAndPoliticalSubdivisionsMember" xlink:type="locator" xlink:label="us-gaap_USStatesAndPoliticalSubdivisionsMember" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LoansMember" xlink:type="locator" xlink:label="us-gaap_LoansMember" />
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    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Loans [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommercialMortgageBackedSecuritiesMember" xlink:type="locator" xlink:label="us-gaap_CommercialMortgageBackedSecuritiesMember" />
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    <link:loc xlink:href="sf-20200930.xsd#sf_MunicipalSecuritiesMember" xlink:type="locator" xlink:label="sf_MunicipalSecuritiesMember" />
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    <link:label xml:lang="en-US" xlink:label="sf_MunicipalSecuritiesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Municipal Securities [Member]</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_OtherInvestmentMember" xlink:type="locator" xlink:label="sf_OtherInvestmentMember" />
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    <link:loc xlink:href="sf-20200930.xsd#sf_InvestmentsInFundsAndPartnershipsMeasuredAtNetAssetValueMember" xlink:type="locator" xlink:label="sf_InvestmentsInFundsAndPartnershipsMeasuredAtNetAssetValueMember" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SovereignDebtMember" xlink:type="locator" xlink:label="us-gaap_SovereignDebtMember" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:type="locator" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" />
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    <link:label xml:lang="en-US" xlink:label="us-gaap_TradingSecurities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Financial instruments owned</link:label>
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    <link:label xml:lang="en-US" xlink:label="sf_CashEquivalentsMeasuredAtNetAssetValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash equivalents measured at NAV</link:label>
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    <link:loc xlink:href="sf-20200930.xsd#sf_AvailableForSaleSecuritiesInUnrealizedLossPositionsPercentageOfAvailableForSalePortfolio" xlink:type="locator" xlink:label="sf_AvailableForSaleSecuritiesInUnrealizedLossPositionsPercentageOfAvailableForSalePortfolio" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1" xlink:type="locator" xlink:label="us-gaap_AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1" />
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    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Available-for-sale Securities, Continuous</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Available-for-sale Securities, Continuous Unrealized</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Available-for-sale Securities, Continuous</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_AvailableForSaleSecuritiesInUnrealizedLossPositionsPercentageOfAvailableForSalePortfolio_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of available-for-sale portfolio</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_AvailableForSaleSecuritiesInUnrealizedLossPositionsPercentageOfAvailableForSalePortfolio_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Available For Sale Securities In Unrealized Loss Positions Percentage Of Available For Sale Portfolio</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfHeldToMaturitySecuritiesTable" xlink:type="locator" xlink:label="us-gaap_ScheduleOfHeldToMaturitySecuritiesTable" />
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    <link:loc xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_CreditRatingMoodysAxis" xlink:type="locator" xlink:label="srt_CreditRatingMoodysAxis" />
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    <link:loc xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_MoodysAaaRatingMember" xlink:type="locator" xlink:label="srt_MoodysAaaRatingMember" />
    <link:label xml:lang="en-US" xlink:label="srt_MoodysAaaRatingMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">AAA [Member]</link:label>
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    <link:loc xlink:href="sf-20200930.xsd#sf_MoodysAaRatingMember" xlink:type="locator" xlink:label="sf_MoodysAaRatingMember" />
    <link:label xml:lang="en-US" xlink:label="sf_MoodysAaRatingMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Moody&apos;s Aa Rating.</link:label>
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    <link:label xml:lang="en-US" xlink:label="sf_MoodysAaRatingMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Moodys Aa Rating [Member]</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_MoodysARatingMember" xlink:type="locator" xlink:label="sf_MoodysARatingMember" />
    <link:label xml:lang="en-US" xlink:label="sf_MoodysARatingMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Moody&apos;s A Rating.</link:label>
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    <link:label xml:lang="en-US" xlink:label="sf_MoodysARatingMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Moodys A Rating [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_MoodysCRatingMember" xlink:type="locator" xlink:label="srt_MoodysCRatingMember" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable" xlink:type="locator" xlink:label="us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable" />
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    <link:loc xlink:href="sf-20200930.xsd#sf_CommercialAndIndustrialMember" xlink:type="locator" xlink:label="sf_CommercialAndIndustrialMember" />
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    <link:loc xlink:href="sf-20200930.xsd#sf_ConstructionAndLandMember" xlink:type="locator" xlink:label="sf_ConstructionAndLandMember" />
    <link:label xml:lang="en-US" xlink:label="sf_ConstructionAndLandMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Construction and land.</link:label>
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    <link:label xml:lang="en-US" xlink:label="sf_ConstructionAndLandMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Construction And Land [Member]</link:label>
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    <link:loc xlink:href="sf-20200930.xsd#sf_OtherLoansMember" xlink:type="locator" xlink:label="sf_OtherLoansMember" />
    <link:label xml:lang="en-US" xlink:label="sf_OtherLoansMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Other loans.</link:label>
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    <link:label xml:lang="en-US" xlink:label="sf_OtherLoansMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Other Loans [Member]</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_SecuritiesBasedLoansMember" xlink:type="locator" xlink:label="sf_SecuritiesBasedLoansMember" />
    <link:label xml:lang="en-US" xlink:label="sf_SecuritiesBasedLoansMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Securities based loans.</link:label>
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    <link:label xml:lang="en-US" xlink:label="sf_SecuritiesBasedLoansMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Securities-Based Loans [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_SecuritiesBasedLoansMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Securities Based Loans [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccountsNotesAndLoansReceivableLineItems" xlink:type="locator" xlink:label="us-gaap_AccountsNotesAndLoansReceivableLineItems" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccountsNotesAndLoansReceivableLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accounts, Notes, Loans and Financing Receivable [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccountsNotesAndLoansReceivableLineItems" xlink:to="us-gaap_AccountsNotesAndLoansReceivableLineItems_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccountsNotesAndLoansReceivableLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Accounts Notes And Loans Receivable [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LoansAndLeasesReceivableGrossCarryingAmount" xlink:type="locator" xlink:label="us-gaap_LoansAndLeasesReceivableGrossCarryingAmount" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansAndLeasesReceivableGrossCarryingAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/positiveTerseLabel">Gross bank loans</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LoansAndLeasesReceivableGrossCarryingAmount" xlink:to="us-gaap_LoansAndLeasesReceivableGrossCarryingAmount_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansAndLeasesReceivableGrossCarryingAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Loans And Leases Receivable Gross Carrying Amount</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_UnamortizedLoanCommitmentAndOriginationFeesAndUnamortizedDiscountsOrPremiums" xlink:type="locator" xlink:label="us-gaap_UnamortizedLoanCommitmentAndOriginationFeesAndUnamortizedDiscountsOrPremiums" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_UnamortizedLoanCommitmentAndOriginationFeesAndUnamortizedDiscountsOrPremiums_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unamortized loan discount, net</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_UnamortizedLoanCommitmentAndOriginationFeesAndUnamortizedDiscountsOrPremiums" xlink:to="us-gaap_UnamortizedLoanCommitmentAndOriginationFeesAndUnamortizedDiscountsOrPremiums_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_UnamortizedLoanCommitmentAndOriginationFeesAndUnamortizedDiscountsOrPremiums_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Unamortized Loan Commitment And Origination Fees And Unamortized Discounts Or Premiums</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_LoansAndLeasesPayableReceivableLoansInProcess_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loans in process</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_LoansAndLeasesPayableReceivableLoansInProcess_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Loans And Leases Payable Receivable Loans In Process</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LoansAndLeasesReceivableDeferredIncome" xlink:type="locator" xlink:label="us-gaap_LoansAndLeasesReceivableDeferredIncome" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansAndLeasesReceivableDeferredIncome_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Unamortized loan fees, net</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LoansAndLeasesReceivableDeferredIncome" xlink:to="us-gaap_LoansAndLeasesReceivableDeferredIncome_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansAndLeasesReceivableDeferredIncome_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Loans And Leases Receivable Deferred Income</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LoansAndLeasesReceivableAllowance" xlink:type="locator" xlink:label="us-gaap_LoansAndLeasesReceivableAllowance" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansAndLeasesReceivableAllowance_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Allowance for loan losses</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LoansAndLeasesReceivableAllowance" xlink:to="us-gaap_LoansAndLeasesReceivableAllowance_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansAndLeasesReceivableAllowance_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Loans And Leases Receivable Allowance</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_LoansReceivableHeldForInvestmentNetNotPartOfDisposalGroupMortgage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Loans held for investment, net</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_PercentageOfLoansAndLeasesReceivableGrossCarryingAmount" xlink:type="locator" xlink:label="sf_PercentageOfLoansAndLeasesReceivableGrossCarryingAmount" />
    <link:label xml:lang="en-US" xlink:label="sf_PercentageOfLoansAndLeasesReceivableGrossCarryingAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of loans and leases receivable gross carrying amount.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_PercentageOfLoansAndLeasesReceivableGrossCarryingAmount" xlink:to="sf_PercentageOfLoansAndLeasesReceivableGrossCarryingAmount_lbl" />
    <link:label xml:lang="en-US" xlink:label="sf_PercentageOfLoansAndLeasesReceivableGrossCarryingAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gross bank loans, Percent</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_PercentageOfLoansAndLeasesReceivableGrossCarryingAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Percentage Of Loans And Leases Receivable Gross Carrying Amount</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:type="locator" xlink:label="dei_LegalEntityAxis" />
    <link:label xml:lang="en-US" xlink:label="dei_LegalEntityAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Legal Entity</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_LegalEntityAxis" xlink:to="dei_LegalEntityAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_LegalEntityAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Legal Entity [Axis]</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:type="locator" xlink:label="dei_EntityDomain" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityDomain" xlink:to="dei_EntityDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity [Domain]</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_StifelBancorpMember" xlink:type="locator" xlink:label="sf_StifelBancorpMember" />
    <link:label xml:lang="en-US" xlink:label="sf_StifelBancorpMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Stifel Bancorp.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_StifelBancorpMember" xlink:to="sf_StifelBancorpMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="sf_StifelBancorpMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stifel Bancorp [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_StifelBancorpMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Stifel Bancorp [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:type="locator" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Related Party</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Transactions By Related Party [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:type="locator" xlink:label="us-gaap_RelatedPartyDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RelatedPartyDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Related Party</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="us-gaap_RelatedPartyDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RelatedPartyDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Related Party [Domain]</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_ExecutiveOfficersAndDirectorsMember" xlink:type="locator" xlink:label="sf_ExecutiveOfficersAndDirectorsMember" />
    <link:label xml:lang="en-US" xlink:label="sf_ExecutiveOfficersAndDirectorsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Executive officers and directors.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_ExecutiveOfficersAndDirectorsMember" xlink:to="sf_ExecutiveOfficersAndDirectorsMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="sf_ExecutiveOfficersAndDirectorsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Executive Officers and Directors [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_ExecutiveOfficersAndDirectorsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Executive Officers And Directors [Member]</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_ExecutiveOfficersAndDirectorsOfCertainAffiliatedEntitiesMember" xlink:type="locator" xlink:label="sf_ExecutiveOfficersAndDirectorsOfCertainAffiliatedEntitiesMember" />
    <link:label xml:lang="en-US" xlink:label="sf_ExecutiveOfficersAndDirectorsOfCertainAffiliatedEntitiesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Executive officers and directors of certain affiliated entities.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_ExecutiveOfficersAndDirectorsOfCertainAffiliatedEntitiesMember" xlink:to="sf_ExecutiveOfficersAndDirectorsOfCertainAffiliatedEntitiesMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="sf_ExecutiveOfficersAndDirectorsOfCertainAffiliatedEntitiesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Executive Officers and Directors of Certain Affiliated Entities [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_ExecutiveOfficersAndDirectorsOfCertainAffiliatedEntitiesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Executive Officers And Directors Of Certain Affiliated Entities [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis" xlink:type="locator" xlink:label="us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Class of Financing Receivable</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis" xlink:to="us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivable Recorded Investment By Class Of Financing Receivable [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain" xlink:type="locator" xlink:label="us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Class of Financing Receivable</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain" xlink:to="us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivable Recorded Investment Class Of Financing Receivable [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_UnfundedLoanCommitmentMember" xlink:type="locator" xlink:label="us-gaap_UnfundedLoanCommitmentMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_UnfundedLoanCommitmentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unfunded Commitment [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_UnfundedLoanCommitmentMember" xlink:to="us-gaap_UnfundedLoanCommitmentMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_UnfundedLoanCommitmentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Unfunded Loan Commitment [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DueFromRelatedPartiesNoncurrent" xlink:type="locator" xlink:label="us-gaap_DueFromRelatedPartiesNoncurrent" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DueFromRelatedPartiesNoncurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loans outstanding amount</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DueFromRelatedPartiesNoncurrent" xlink:to="us-gaap_DueFromRelatedPartiesNoncurrent_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DueFromRelatedPartiesNoncurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Due From Related Parties Noncurrent</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansReceivableHeldForSaleNetNotPartOfDisposalGroup_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Mortgage loans held for sale</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_GainLossOnSaleOfMortgageLoans" xlink:type="locator" xlink:label="us-gaap_GainLossOnSaleOfMortgageLoans" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_GainLossOnSaleOfMortgageLoans_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gains (losses) recognized from sale of loans</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GainLossOnSaleOfMortgageLoans" xlink:to="us-gaap_GainLossOnSaleOfMortgageLoans_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_GainLossOnSaleOfMortgageLoans_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Gain Loss On Sale Of Mortgage Loans</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_LoansAndLeasesReceivableAllowanceImpactOfCurrentExpectedCreditLossAdoption" xlink:type="locator" xlink:label="sf_LoansAndLeasesReceivableAllowanceImpactOfCurrentExpectedCreditLossAdoption" />
    <link:label xml:lang="en-US" xlink:label="sf_LoansAndLeasesReceivableAllowanceImpactOfCurrentExpectedCreditLossAdoption_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Loans and leases receivable allowance impact of current expected credit loss adoption.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_LoansAndLeasesReceivableAllowanceImpactOfCurrentExpectedCreditLossAdoption" xlink:to="sf_LoansAndLeasesReceivableAllowanceImpactOfCurrentExpectedCreditLossAdoption_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable" xlink:type="locator" xlink:label="us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Financing Receivable Allowance For Credit Losses [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable" xlink:to="us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Financing Receivable Allowance For Credit Losses [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_UnallocatedFinancingReceivablesMember" xlink:type="locator" xlink:label="us-gaap_UnallocatedFinancingReceivablesMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_UnallocatedFinancingReceivablesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unallocated [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_UnallocatedFinancingReceivablesMember" xlink:to="us-gaap_UnallocatedFinancingReceivablesMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_UnallocatedFinancingReceivablesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Unallocated Financing Receivables [Member]</link:label>
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    <link:loc xlink:href="sf-20200930.xsd#sf_QualitativeMember" xlink:type="locator" xlink:label="sf_QualitativeMember" />
    <link:label xml:lang="en-US" xlink:label="sf_QualitativeMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Qualitative.</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment" xlink:type="locator" xlink:label="us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment" />
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    <link:loc xlink:href="sf-20200930.xsd#sf_FinancingReceivableTroubledDebtRestructuringAmount" xlink:type="locator" xlink:label="sf_FinancingReceivableTroubledDebtRestructuringAmount" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LoansAndLeasesReceivableImpairedNonperformingNonaccrualOfInterest" xlink:type="locator" xlink:label="us-gaap_LoansAndLeasesReceivableImpairedNonperformingNonaccrualOfInterest" />
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    <link:loc xlink:href="sf-20200930.xsd#sf_FinancingReceivableRecordedInvestmentNonperformingLoansWithNoAllowance" xlink:type="locator" xlink:label="sf_FinancingReceivableRecordedInvestmentNonperformingLoansWithNoAllowance" />
    <link:label xml:lang="en-US" xlink:label="sf_FinancingReceivableRecordedInvestmentNonperformingLoansWithNoAllowance_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Financing receivable recorded investment nonperforming loans with no allowance.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_FinancingReceivableRecordedInvestmentNonperformingLoansWithNoAllowance" xlink:to="sf_FinancingReceivableRecordedInvestmentNonperformingLoansWithNoAllowance_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfFinancingReceivablesPastDueTable" xlink:type="locator" xlink:label="us-gaap_ScheduleOfFinancingReceivablesPastDueTable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfFinancingReceivablesPastDueTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Financing Receivables Past Due [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfFinancingReceivablesPastDueTable" xlink:to="us-gaap_ScheduleOfFinancingReceivablesPastDueTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfFinancingReceivablesPastDueTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Financing Receivables Past Due [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivablesPeriodPastDueAxis" xlink:type="locator" xlink:label="us-gaap_FinancingReceivablesPeriodPastDueAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivablesPeriodPastDueAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Financial Asset, Period Past Due</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancingReceivablesPeriodPastDueAxis" xlink:to="us-gaap_FinancingReceivablesPeriodPastDueAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivablesPeriodPastDueAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivables Period Past Due [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivablesPeriodPastDueDomain" xlink:type="locator" xlink:label="us-gaap_FinancingReceivablesPeriodPastDueDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivablesPeriodPastDueDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Financial Asset, Period Past Due</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancingReceivablesPeriodPastDueDomain" xlink:to="us-gaap_FinancingReceivablesPeriodPastDueDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivablesPeriodPastDueDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivables Period Past Due [Domain]</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_FinancingReceivables30To89DaysPastDueMember" xlink:type="locator" xlink:label="sf_FinancingReceivables30To89DaysPastDueMember" />
    <link:label xml:lang="en-US" xlink:label="sf_FinancingReceivables30To89DaysPastDueMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Financing receivables 30 to 89 days past due.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_FinancingReceivables30To89DaysPastDueMember" xlink:to="sf_FinancingReceivables30To89DaysPastDueMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="sf_FinancingReceivables30To89DaysPastDueMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">30 - 89 Days Past Due [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_FinancingReceivables30To89DaysPastDueMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivables30 To89 Days Past Due [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember" xlink:type="locator" xlink:label="us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">90 or More Days Past Due [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember" xlink:to="us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivables Equal To Greater Than90 Days Past Due [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems" xlink:type="locator" xlink:label="us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Financing Receivable Recorded Investment Past Due [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems" xlink:to="us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivable Recorded Investment Past Due [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentPastDue" xlink:type="locator" xlink:label="us-gaap_FinancingReceivableRecordedInvestmentPastDue" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableRecordedInvestmentPastDue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total Past Due</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancingReceivableRecordedInvestmentPastDue" xlink:to="us-gaap_FinancingReceivableRecordedInvestmentPastDue_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableRecordedInvestmentPastDue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivable Recorded Investment Past Due</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentCurrent" xlink:type="locator" xlink:label="us-gaap_FinancingReceivableRecordedInvestmentCurrent" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableRecordedInvestmentCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Current Balance</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancingReceivableRecordedInvestmentCurrent" xlink:to="us-gaap_FinancingReceivableRecordedInvestmentCurrent_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableRecordedInvestmentCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivable Recorded Investment Current</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus" xlink:type="locator" xlink:label="us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Non-Accrual</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus" xlink:to="us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivable Recorded Investment Nonaccrual Status</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivableModificationsRecordedInvestment" xlink:type="locator" xlink:label="us-gaap_FinancingReceivableModificationsRecordedInvestment" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableModificationsRecordedInvestment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Restructured</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancingReceivableModificationsRecordedInvestment" xlink:to="us-gaap_FinancingReceivableModificationsRecordedInvestment_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableModificationsRecordedInvestment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivable Modifications Recorded Investment</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_FinancingReceivableRecordedInvestmentNonperformingLoansWithNoAllowance_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Nonperforming loans with no allowance</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_FinancingReceivableRecordedInvestmentNonperformingLoansWithNoAllowance_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivable Recorded Investment Nonperforming Loans With No Allowance</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_FinancingReceivableRecordedInvestmentNonaccrualStatusRestructuredLoansAndNonperformingLoansWithNoAllowance_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_FinancingReceivableRecordedInvestmentNonaccrualStatusRestructuredLoansAndNonperformingLoansWithNoAllowance_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivable Recorded Investment Nonaccrual Status Restructured Loans And Nonperforming Loans With No Allowance</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing" xlink:type="locator" xlink:label="us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loans past due 90 days and still accruing interest</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing" xlink:to="us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivable Recorded Investment90 Days Past Due And Still Accruing</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_FinancingReceivableRecordedInvestmentNonaccrualStatusAndRestructuredLoans_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_FinancingReceivableRecordedInvestmentNonaccrualStatusAndRestructuredLoans_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivable Recorded Investment Nonaccrual Status And Restructured Loans</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_CollateralizedLoanPortfolio" xlink:type="locator" xlink:label="sf_CollateralizedLoanPortfolio" />
    <link:label xml:lang="en-US" xlink:label="sf_CollateralizedLoanPortfolio_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Collateralized loan portfolio.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_CollateralizedLoanPortfolio" xlink:to="sf_CollateralizedLoanPortfolio_lbl" />
    <link:label xml:lang="en-US" xlink:label="sf_CollateralizedLoanPortfolio_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Collateralized loan portfolio</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_CollateralizedLoanPortfolio_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Collateralized Loan Portfolio</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable" xlink:type="locator" xlink:label="us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Financing Receivable Recorded Investment Credit Quality Indicator [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable" xlink:to="us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Financing Receivable Recorded Investment Credit Quality Indicator [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InternalCreditAssessmentAxis" xlink:type="locator" xlink:label="us-gaap_InternalCreditAssessmentAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InternalCreditAssessmentAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Internal Credit Assessment</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InternalCreditAssessmentAxis" xlink:to="us-gaap_InternalCreditAssessmentAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InternalCreditAssessmentAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Internal Credit Assessment [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InternalCreditAssessmentDomain" xlink:type="locator" xlink:label="us-gaap_InternalCreditAssessmentDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InternalCreditAssessmentDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Internal Credit Assessment</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InternalCreditAssessmentDomain" xlink:to="us-gaap_InternalCreditAssessmentDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InternalCreditAssessmentDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Internal Credit Assessment [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PassMember" xlink:type="locator" xlink:label="us-gaap_PassMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PassMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Pass [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PassMember" xlink:to="us-gaap_PassMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PassMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Pass [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SpecialMentionMember" xlink:type="locator" xlink:label="us-gaap_SpecialMentionMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SpecialMentionMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Special Mention [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SpecialMentionMember" xlink:to="us-gaap_SpecialMentionMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SpecialMentionMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Special Mention [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SubstandardMember" xlink:type="locator" xlink:label="us-gaap_SubstandardMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SubstandardMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Substandard [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubstandardMember" xlink:to="us-gaap_SubstandardMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SubstandardMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Substandard [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DoubtfulMember" xlink:type="locator" xlink:label="us-gaap_DoubtfulMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DoubtfulMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Doubtful [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DoubtfulMember" xlink:to="us-gaap_DoubtfulMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DoubtfulMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Doubtful [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentLineItems" xlink:type="locator" xlink:label="us-gaap_FinancingReceivableRecordedInvestmentLineItems" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableRecordedInvestmentLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Financing Receivable Recorded Investment [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancingReceivableRecordedInvestmentLineItems" xlink:to="us-gaap_FinancingReceivableRecordedInvestmentLineItems_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableRecordedInvestmentLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivable Recorded Investment [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansAndLeasesReceivableGrossCarryingAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Total risk category of loan portfolio</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_RevolvingLoansAmortizedCostBasisMember" xlink:type="locator" xlink:label="sf_RevolvingLoansAmortizedCostBasisMember" />
    <link:label xml:lang="en-US" xlink:label="sf_RevolvingLoansAmortizedCostBasisMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Revolving loans amortized cost basis.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_RevolvingLoansAmortizedCostBasisMember" xlink:to="sf_RevolvingLoansAmortizedCostBasisMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="sf_RevolvingLoansAmortizedCostBasisMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Revolving Loans Amortized Cost Basis [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_RevolvingLoansAmortizedCostBasisMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Revolving Loans Amortized Cost Basis [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_StatementScenarioAxis" xlink:type="locator" xlink:label="srt_StatementScenarioAxis" />
    <link:label xml:lang="en-US" xlink:label="srt_StatementScenarioAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Scenario</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_StatementScenarioAxis" xlink:to="srt_StatementScenarioAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_StatementScenarioAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Statement Scenario [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ScenarioUnspecifiedDomain" xlink:type="locator" xlink:label="srt_ScenarioUnspecifiedDomain" />
    <link:label xml:lang="en-US" xlink:label="srt_ScenarioUnspecifiedDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Scenario</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_ScenarioUnspecifiedDomain" xlink:to="srt_ScenarioUnspecifiedDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_ScenarioUnspecifiedDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Scenario Unspecified [Domain]</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_TermLoansAmortizedCostBasisByOriginationYearTwoThousandTwentyMember" xlink:type="locator" xlink:label="sf_TermLoansAmortizedCostBasisByOriginationYearTwoThousandTwentyMember" />
    <link:label xml:lang="en-US" xlink:label="sf_TermLoansAmortizedCostBasisByOriginationYearTwoThousandTwentyMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Term loans amortized cost basis by origination year two thousand twenty.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_TermLoansAmortizedCostBasisByOriginationYearTwoThousandTwentyMember" xlink:to="sf_TermLoansAmortizedCostBasisByOriginationYearTwoThousandTwentyMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="sf_TermLoansAmortizedCostBasisByOriginationYearTwoThousandTwentyMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Prior [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_TermLoansAmortizedCostBasisByOriginationYearTwoThousandTwentyMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Term Loans Amortized Cost Basis By Origination Year Two Thousand Twenty [Member]</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_TermLoansAmortizedCostBasisByOriginationYearTwoThousandNineteenMember" xlink:type="locator" xlink:label="sf_TermLoansAmortizedCostBasisByOriginationYearTwoThousandNineteenMember" />
    <link:label xml:lang="en-US" xlink:label="sf_TermLoansAmortizedCostBasisByOriginationYearTwoThousandNineteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Term loans amortized cost basis by origination year two thousand nineteen.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_TermLoansAmortizedCostBasisByOriginationYearTwoThousandNineteenMember" xlink:to="sf_TermLoansAmortizedCostBasisByOriginationYearTwoThousandNineteenMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="sf_TermLoansAmortizedCostBasisByOriginationYearTwoThousandNineteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Prior [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_TermLoansAmortizedCostBasisByOriginationYearTwoThousandNineteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Term Loans Amortized Cost Basis By Origination Year Two Thousand Nineteen [Member]</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_TermLoansAmortizedCostBasisByOriginationYearTwoThousandEighteenMember" xlink:type="locator" xlink:label="sf_TermLoansAmortizedCostBasisByOriginationYearTwoThousandEighteenMember" />
    <link:label xml:lang="en-US" xlink:label="sf_TermLoansAmortizedCostBasisByOriginationYearTwoThousandEighteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Term loans amortized cost basis by origination year two thousand eighteen.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_TermLoansAmortizedCostBasisByOriginationYearTwoThousandEighteenMember" xlink:to="sf_TermLoansAmortizedCostBasisByOriginationYearTwoThousandEighteenMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="sf_TermLoansAmortizedCostBasisByOriginationYearTwoThousandEighteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Prior [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_TermLoansAmortizedCostBasisByOriginationYearTwoThousandEighteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Term Loans Amortized Cost Basis By Origination Year Two Thousand Eighteen [Member]</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_TermLoansAmortizedCostBasisByOriginationYearTwoThousandSeventeenMember" xlink:type="locator" xlink:label="sf_TermLoansAmortizedCostBasisByOriginationYearTwoThousandSeventeenMember" />
    <link:label xml:lang="en-US" xlink:label="sf_TermLoansAmortizedCostBasisByOriginationYearTwoThousandSeventeenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Term loans amortized cost basis by origination year two thousand seventeen.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_TermLoansAmortizedCostBasisByOriginationYearTwoThousandSeventeenMember" xlink:to="sf_TermLoansAmortizedCostBasisByOriginationYearTwoThousandSeventeenMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="sf_TermLoansAmortizedCostBasisByOriginationYearTwoThousandSeventeenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Prior [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_TermLoansAmortizedCostBasisByOriginationYearTwoThousandSeventeenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Term Loans Amortized Cost Basis By Origination Year Two Thousand Seventeen [Member]</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_TermLoansAmortizedCostBasisByOriginationYearTwoThousandSixteenMember" xlink:type="locator" xlink:label="sf_TermLoansAmortizedCostBasisByOriginationYearTwoThousandSixteenMember" />
    <link:label xml:lang="en-US" xlink:label="sf_TermLoansAmortizedCostBasisByOriginationYearTwoThousandSixteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Term loans amortized cost basis by origination year two thousand sixteen.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_TermLoansAmortizedCostBasisByOriginationYearTwoThousandSixteenMember" xlink:to="sf_TermLoansAmortizedCostBasisByOriginationYearTwoThousandSixteenMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="sf_TermLoansAmortizedCostBasisByOriginationYearTwoThousandSixteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Prior [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_TermLoansAmortizedCostBasisByOriginationYearTwoThousandSixteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Term Loans Amortized Cost Basis By Origination Year Two Thousand Sixteen [Member]</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_TermLoansAmortizedCostBasisByOriginationYearPriorToTwoThousandSixteenMember" xlink:type="locator" xlink:label="sf_TermLoansAmortizedCostBasisByOriginationYearPriorToTwoThousandSixteenMember" />
    <link:label xml:lang="en-US" xlink:label="sf_TermLoansAmortizedCostBasisByOriginationYearPriorToTwoThousandSixteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Term loans amortized cost basis by origination year prior to two thousand sixteen.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_TermLoansAmortizedCostBasisByOriginationYearPriorToTwoThousandSixteenMember" xlink:to="sf_TermLoansAmortizedCostBasisByOriginationYearPriorToTwoThousandSixteenMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="sf_TermLoansAmortizedCostBasisByOriginationYearPriorToTwoThousandSixteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Prior [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_TermLoansAmortizedCostBasisByOriginationYearPriorToTwoThousandSixteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Term Loans Amortized Cost Basis By Origination Year Prior To Two Thousand Sixteen [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansAndLeasesReceivableGrossCarryingAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Term loans amortized cost basis by origination year</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_ScheduleOfGoodwillAndIntangibleAssetsLineItems" xlink:type="locator" xlink:label="sf_ScheduleOfGoodwillAndIntangibleAssetsLineItems" />
    <link:label xml:lang="en-US" xlink:label="sf_ScheduleOfGoodwillAndIntangibleAssetsLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Schedule of goodwill and intangible assets.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_ScheduleOfGoodwillAndIntangibleAssetsLineItems" xlink:to="sf_ScheduleOfGoodwillAndIntangibleAssetsLineItems_lbl" />
    <link:loc xlink:href="sf-20200930.xsd#sf_ScheduleOfGoodwillAndIntangibleAssetsTable" xlink:type="locator" xlink:label="sf_ScheduleOfGoodwillAndIntangibleAssetsTable" />
    <link:label xml:lang="en-US" xlink:label="sf_ScheduleOfGoodwillAndIntangibleAssetsTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Schedule of goodwill and intangible assets.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_ScheduleOfGoodwillAndIntangibleAssetsTable" xlink:to="sf_ScheduleOfGoodwillAndIntangibleAssetsTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="sf_ScheduleOfGoodwillAndIntangibleAssetsTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Goodwill And Intangible Assets [Table]</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_ScheduleOfGoodwillAndIntangibleAssetsTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Goodwill And Intangible Assets [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:type="locator" xlink:label="us-gaap_StatementBusinessSegmentsAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StatementBusinessSegmentsAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Segments</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementBusinessSegmentsAxis" xlink:to="us-gaap_StatementBusinessSegmentsAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StatementBusinessSegmentsAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Statement Business Segments [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SegmentDomain" xlink:type="locator" xlink:label="us-gaap_SegmentDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SegmentDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Segments</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SegmentDomain" xlink:to="us-gaap_SegmentDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SegmentDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Segment [Domain]</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_GlobalWealthManagementMember" xlink:type="locator" xlink:label="sf_GlobalWealthManagementMember" />
    <link:label xml:lang="en-US" xlink:label="sf_GlobalWealthManagementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Global wealth management.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_GlobalWealthManagementMember" xlink:to="sf_GlobalWealthManagementMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="sf_GlobalWealthManagementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Global Wealth Management [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_GlobalWealthManagementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Global Wealth Management [Member]</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_InstitutionalGroupMember" xlink:type="locator" xlink:label="sf_InstitutionalGroupMember" />
    <link:label xml:lang="en-US" xlink:label="sf_InstitutionalGroupMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Institutional group.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_InstitutionalGroupMember" xlink:to="sf_InstitutionalGroupMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="sf_InstitutionalGroupMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Institutional Group [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_InstitutionalGroupMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Institutional Group [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_ScheduleOfGoodwillAndIntangibleAssetsLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Goodwill and Intangible Assets [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_ScheduleOfGoodwillAndIntangibleAssetsLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Goodwill And Intangible Assets [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_Goodwill_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Goodwill, Beginning balance</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_GoodwillTranslationAndPurchaseAccountingAdjustments" xlink:type="locator" xlink:label="us-gaap_GoodwillTranslationAndPurchaseAccountingAdjustments" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_GoodwillTranslationAndPurchaseAccountingAdjustments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Goodwill, Adjustments</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GoodwillTranslationAndPurchaseAccountingAdjustments" xlink:to="us-gaap_GoodwillTranslationAndPurchaseAccountingAdjustments_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_GoodwillTranslationAndPurchaseAccountingAdjustments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Goodwill Translation And Purchase Accounting Adjustments</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_GoodwillWrittenOffRelatedToSaleOfBusinessUnit" xlink:type="locator" xlink:label="us-gaap_GoodwillWrittenOffRelatedToSaleOfBusinessUnit" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_GoodwillWrittenOffRelatedToSaleOfBusinessUnit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Goodwill, Sale of ZCM</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GoodwillWrittenOffRelatedToSaleOfBusinessUnit" xlink:to="us-gaap_GoodwillWrittenOffRelatedToSaleOfBusinessUnit_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_GoodwillWrittenOffRelatedToSaleOfBusinessUnit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Goodwill Written Off Related To Sale Of Business Unit</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_Goodwill_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Goodwill, Ending balance</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_IntangibleAssetsNetExcludingGoodwill_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Intangible assets, Beginning balance</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsTranslationAndPurchaseAccountingAdjustments" xlink:type="locator" xlink:label="us-gaap_IndefiniteLivedIntangibleAssetsTranslationAndPurchaseAccountingAdjustments" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IndefiniteLivedIntangibleAssetsTranslationAndPurchaseAccountingAdjustments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Intangible assets, Adjustments / Sale of ZCM</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IndefiniteLivedIntangibleAssetsTranslationAndPurchaseAccountingAdjustments" xlink:to="us-gaap_IndefiniteLivedIntangibleAssetsTranslationAndPurchaseAccountingAdjustments_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IndefiniteLivedIntangibleAssetsTranslationAndPurchaseAccountingAdjustments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Indefinite Lived Intangible Assets Translation And Purchase Accounting Adjustments</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_AmortizationOfIntangibleAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Intangible assets, Amortization</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_IntangibleAssetsNetExcludingGoodwill_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Intangible assets, Ending balance</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessAcquisitionAxis" xlink:type="locator" xlink:label="us-gaap_BusinessAcquisitionAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BusinessAcquisitionAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Business Acquisition</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessAcquisitionAxis" xlink:to="us-gaap_BusinessAcquisitionAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BusinessAcquisitionAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Business Acquisition [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:type="locator" xlink:label="us-gaap_BusinessAcquisitionAcquireeDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BusinessAcquisitionAcquireeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Business Acquisition, Acquiree</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessAcquisitionAcquireeDomain" xlink:to="us-gaap_BusinessAcquisitionAcquireeDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BusinessAcquisitionAcquireeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Business Acquisition Acquiree [Domain]</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_MainFirstBankAGMember" xlink:type="locator" xlink:label="sf_MainFirstBankAGMember" />
    <link:label xml:lang="en-US" xlink:label="sf_MainFirstBankAGMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">MainFirst Bank AG.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_MainFirstBankAGMember" xlink:to="sf_MainFirstBankAGMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="sf_MainFirstBankAGMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">MainFirst Bank AG [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_MainFirstBankAGMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Main First Bank A G [Member]</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_GMPCapitalIncMember" xlink:type="locator" xlink:label="sf_GMPCapitalIncMember" />
    <link:label xml:lang="en-US" xlink:label="sf_GMPCapitalIncMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">GMP Capital Inc.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_GMPCapitalIncMember" xlink:to="sf_GMPCapitalIncMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="sf_GMPCapitalIncMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">GMP Capital Inc. [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_GMPCapitalIncMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">G M P Capital Inc [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:type="locator" xlink:label="us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Finite-Lived Intangible Assets by Major Class</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:to="us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Finite Lived Intangible Assets By Major Class [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:type="locator" xlink:label="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Finite-Lived Intangible Assets, Major Class Name</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:to="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Finite Lived Intangible Assets Major Class Name [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CustomerRelationshipsMember" xlink:type="locator" xlink:label="us-gaap_CustomerRelationshipsMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CustomerRelationshipsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Customer Relationships [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CustomerRelationshipsMember" xlink:to="us-gaap_CustomerRelationshipsMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CustomerRelationshipsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Customer Relationships [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TradeNamesMember" xlink:type="locator" xlink:label="us-gaap_TradeNamesMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TradeNamesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Trade Name [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TradeNamesMember" xlink:to="us-gaap_TradeNamesMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TradeNamesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Trade Names [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CoreDepositsMember" xlink:type="locator" xlink:label="us-gaap_CoreDepositsMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CoreDepositsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Core Deposits [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CoreDepositsMember" xlink:to="us-gaap_CoreDepositsMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CoreDepositsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Core Deposits [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NoncompeteAgreementsMember" xlink:type="locator" xlink:label="us-gaap_NoncompeteAgreementsMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NoncompeteAgreementsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Non-Compete Agreements [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NoncompeteAgreementsMember" xlink:to="us-gaap_NoncompeteAgreementsMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NoncompeteAgreementsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Noncompete Agreements [Member]</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_InvestmentBankingBacklogMember" xlink:type="locator" xlink:label="sf_InvestmentBankingBacklogMember" />
    <link:label xml:lang="en-US" xlink:label="sf_InvestmentBankingBacklogMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Investment banking backlog.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_InvestmentBankingBacklogMember" xlink:to="sf_InvestmentBankingBacklogMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="sf_InvestmentBankingBacklogMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investment Banking Backlog [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_InvestmentBankingBacklogMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Investment Banking Backlog [Member]</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_AcquiredTechnologyMember" xlink:type="locator" xlink:label="sf_AcquiredTechnologyMember" />
    <link:label xml:lang="en-US" xlink:label="sf_AcquiredTechnologyMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Acquired technology.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_AcquiredTechnologyMember" xlink:to="sf_AcquiredTechnologyMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="sf_AcquiredTechnologyMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Acquired Technology [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_AcquiredTechnologyMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Acquired Technology [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessAcquisitionEffectiveDateOfAcquisition1" xlink:type="locator" xlink:label="us-gaap_BusinessAcquisitionEffectiveDateOfAcquisition1" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BusinessAcquisitionEffectiveDateOfAcquisition1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Date of acquisition</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessAcquisitionEffectiveDateOfAcquisition1" xlink:to="us-gaap_BusinessAcquisitionEffectiveDateOfAcquisition1_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BusinessAcquisitionEffectiveDateOfAcquisition1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Business Acquisition Effective Date Of Acquisition1</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable" xlink:type="locator" xlink:label="us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Finite Lived Intangible Assets [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable" xlink:to="us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Finite Lived Intangible Assets [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems" xlink:type="locator" xlink:label="us-gaap_FiniteLivedIntangibleAssetsLineItems" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Finite-Lived Intangible Assets [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FiniteLivedIntangibleAssetsLineItems" xlink:to="us-gaap_FiniteLivedIntangibleAssetsLineItems_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Finite Lived Intangible Assets [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsGross" xlink:type="locator" xlink:label="us-gaap_FiniteLivedIntangibleAssetsGross" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsGross_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gross Carrying Value</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FiniteLivedIntangibleAssetsGross" xlink:to="us-gaap_FiniteLivedIntangibleAssetsGross_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsGross_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Finite Lived Intangible Assets Gross</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization" xlink:type="locator" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accumulated Amortization</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization" xlink:to="us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Finite Lived Intangible Assets Accumulated Amortization</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetUsefulLife" xlink:type="locator" xlink:label="us-gaap_FiniteLivedIntangibleAssetUsefulLife" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetUsefulLife_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted-average remaining lives of intangible assets</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FiniteLivedIntangibleAssetUsefulLife" xlink:to="us-gaap_FiniteLivedIntangibleAssetUsefulLife_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetUsefulLife_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Finite Lived Intangible Asset Useful Life</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFour" xlink:type="locator" xlink:label="sf_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFour" />
    <link:label xml:lang="en-US" xlink:label="sf_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFour_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Finite lived intangible assets amortization expense after year four.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFour" xlink:to="sf_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFour_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear" xlink:type="locator" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Remainder of 2020</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear" xlink:to="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Finite Lived Intangible Assets Amortization Expense Remainder Of Fiscal Year</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths" xlink:type="locator" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2021</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths" xlink:to="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Finite Lived Intangible Assets Amortization Expense Next Twelve Months</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo" xlink:type="locator" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2022</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo" xlink:to="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Finite Lived Intangible Assets Amortization Expense Year Two</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree" xlink:type="locator" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2023</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree" xlink:to="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Finite Lived Intangible Assets Amortization Expense Year Three</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour" xlink:type="locator" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2024</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour" xlink:to="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Finite Lived Intangible Assets Amortization Expense Year Four</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFour_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Thereafter</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFour_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Finite Lived Intangible Assets Amortization Expense After Year Four</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet" xlink:type="locator" xlink:label="us-gaap_FiniteLivedIntangibleAssetsNet" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Future amortization expense total</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FiniteLivedIntangibleAssetsNet" xlink:to="us-gaap_FiniteLivedIntangibleAssetsNet_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Finite Lived Intangible Assets Net</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_UncommittedSecuredLinesOfCredit" xlink:type="locator" xlink:label="sf_UncommittedSecuredLinesOfCredit" />
    <link:label xml:lang="en-US" xlink:label="sf_UncommittedSecuredLinesOfCredit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Uncommitted secured lines of credit.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_UncommittedSecuredLinesOfCredit" xlink:to="sf_UncommittedSecuredLinesOfCredit_lbl" />
    <link:loc xlink:href="sf-20200930.xsd#sf_NumberOfBanksWithWhichEntityHasCommittedRevolvingCreditFacility" xlink:type="locator" xlink:label="sf_NumberOfBanksWithWhichEntityHasCommittedRevolvingCreditFacility" />
    <link:label xml:lang="en-US" xlink:label="sf_NumberOfBanksWithWhichEntityHasCommittedRevolvingCreditFacility_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of banks with which entity has committed revolving credit facility.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_NumberOfBanksWithWhichEntityHasCommittedRevolvingCreditFacility" xlink:to="sf_NumberOfBanksWithWhichEntityHasCommittedRevolvingCreditFacility_lbl" />
    <link:loc xlink:href="sf-20200930.xsd#sf_DailyBorrowingsUnderCreditArrangements" xlink:type="locator" xlink:label="sf_DailyBorrowingsUnderCreditArrangements" />
    <link:label xml:lang="en-US" xlink:label="sf_DailyBorrowingsUnderCreditArrangements_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Daily borrowings under credit arrangements.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_DailyBorrowingsUnderCreditArrangements" xlink:to="sf_DailyBorrowingsUnderCreditArrangements_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfShortTermDebtTable" xlink:type="locator" xlink:label="us-gaap_ScheduleOfShortTermDebtTable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfShortTermDebtTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Short Term Debt [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfShortTermDebtTable" xlink:to="us-gaap_ScheduleOfShortTermDebtTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfShortTermDebtTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Short Term Debt [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShortTermDebtTypeAxis" xlink:type="locator" xlink:label="us-gaap_ShortTermDebtTypeAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShortTermDebtTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Short-term Debt, Type</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShortTermDebtTypeAxis" xlink:to="us-gaap_ShortTermDebtTypeAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShortTermDebtTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Short Term Debt Type [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShortTermDebtTypeDomain" xlink:type="locator" xlink:label="us-gaap_ShortTermDebtTypeDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShortTermDebtTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Short-term Debt, Type</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShortTermDebtTypeDomain" xlink:to="us-gaap_ShortTermDebtTypeDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShortTermDebtTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Short Term Debt Type [Domain]</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_CompanyOwnedSecuritiesMember" xlink:type="locator" xlink:label="sf_CompanyOwnedSecuritiesMember" />
    <link:label xml:lang="en-US" xlink:label="sf_CompanyOwnedSecuritiesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Company owned securities.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_CompanyOwnedSecuritiesMember" xlink:to="sf_CompanyOwnedSecuritiesMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="sf_CompanyOwnedSecuritiesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Company Owned Securities [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_CompanyOwnedSecuritiesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Company Owned Securities [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FederalHomeLoanBankAdvancesMember" xlink:type="locator" xlink:label="us-gaap_FederalHomeLoanBankAdvancesMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FederalHomeLoanBankAdvancesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Federal Home Loan Bank advances [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FederalHomeLoanBankAdvancesMember" xlink:to="us-gaap_FederalHomeLoanBankAdvancesMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FederalHomeLoanBankAdvancesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Federal Home Loan Bank Advances [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RevolvingCreditFacilityMember" xlink:type="locator" xlink:label="us-gaap_RevolvingCreditFacilityMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RevolvingCreditFacilityMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Revolving Credit Facility [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RevolvingCreditFacilityMember" xlink:to="us-gaap_RevolvingCreditFacilityMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RevolvingCreditFacilityMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Revolving Credit Facility [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShortTermDebtLineItems" xlink:type="locator" xlink:label="us-gaap_ShortTermDebtLineItems" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShortTermDebtLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Short-term Debt [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShortTermDebtLineItems" xlink:to="us-gaap_ShortTermDebtLineItems_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShortTermDebtLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Short Term Debt [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_UncommittedSecuredLinesOfCredit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Uncommitted secured lines of credit</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_UncommittedSecuredLinesOfCredit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Uncommitted Secured Lines Of Credit</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_NumberOfBanksWithWhichEntityHasCommittedRevolvingCreditFacility_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of banks</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_NumberOfBanksWithWhichEntityHasCommittedRevolvingCreditFacility_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Banks With Which Entity Has Committed Revolving Credit Facility</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_DailyBorrowingsUnderCreditArrangements_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Daily borrowings under our uncommitted secured lines</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_DailyBorrowingsUnderCreditArrangements_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Daily Borrowings Under Credit Arrangements</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CompensatingBalanceAmount" xlink:type="locator" xlink:label="us-gaap_CompensatingBalanceAmount" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CompensatingBalanceAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Compensating balances</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CompensatingBalanceAmount" xlink:to="us-gaap_CompensatingBalanceAmount_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CompensatingBalanceAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Compensating Balance Amount</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_WeightedAverageInterestRateOnBorrowings" xlink:type="locator" xlink:label="sf_WeightedAverageInterestRateOnBorrowings" />
    <link:label xml:lang="en-US" xlink:label="sf_WeightedAverageInterestRateOnBorrowings_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Weighted average interest rate on borrowings.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_WeightedAverageInterestRateOnBorrowings" xlink:to="sf_WeightedAverageInterestRateOnBorrowings_lbl" />
    <link:label xml:lang="en-US" xlink:label="sf_WeightedAverageInterestRateOnBorrowings_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted average interest rate on borrowings</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_WeightedAverageInterestRateOnBorrowings_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Weighted Average Interest Rate On Borrowings</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FederalHomeLoanBankAdvancesFloatingRate" xlink:type="locator" xlink:label="us-gaap_FederalHomeLoanBankAdvancesFloatingRate" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FederalHomeLoanBankAdvancesFloatingRate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Federal Home Loan Bank Advances Floating Rate</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FederalHomeLoanBankAdvancesFloatingRate" xlink:to="us-gaap_FederalHomeLoanBankAdvancesFloatingRate_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FederalHomeLoanBankAdvancesFloatingRate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Federal Home Loan Bank Advances Floating Rate</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_LineOfCreditFacilityExpirationMonthAndYear" xlink:type="locator" xlink:label="sf_LineOfCreditFacilityExpirationMonthAndYear" />
    <link:label xml:lang="en-US" xlink:label="sf_LineOfCreditFacilityExpirationMonthAndYear_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Line of credit facility expiration month and year.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_LineOfCreditFacilityExpirationMonthAndYear" xlink:to="sf_LineOfCreditFacilityExpirationMonthAndYear_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Committed revolving credit facility with bank and broker dealer - subsidiary</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_LineOfCreditFacilityExpirationMonthAndYear_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Credit facility expiration date</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_LineOfCreditFacilityExpirationMonthAndYear_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Line Of Credit Facility Expiration Month And Year</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">LIBOR rate</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" xlink:to="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Basis Spread On Variable Rate1</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LineOfCredit" xlink:type="locator" xlink:label="us-gaap_LineOfCredit" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LineOfCredit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Outstanding credit facility</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LineOfCredit" xlink:to="us-gaap_LineOfCredit_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LineOfCredit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Line Of Credit</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_LineOfCreditFacilityExpirationDays" xlink:type="locator" xlink:label="sf_LineOfCreditFacilityExpirationDays" />
    <link:label xml:lang="en-US" xlink:label="sf_LineOfCreditFacilityExpirationDays_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Line of credit facility expiration days.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_LineOfCreditFacilityExpirationDays" xlink:to="sf_LineOfCreditFacilityExpirationDays_lbl" />
    <link:label xml:lang="en-US" xlink:label="sf_LineOfCreditFacilityExpirationDays_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Credit agreement maturity days</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_LineOfCreditFacilityExpirationDays_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Line Of Credit Facility Expiration Days</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentTable" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentTable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt Instrument [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentTable" xlink:to="us-gaap_DebtInstrumentTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LongtermDebtTypeAxis" xlink:type="locator" xlink:label="us-gaap_LongtermDebtTypeAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LongtermDebtTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Long-term Debt, Type</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongtermDebtTypeAxis" xlink:to="us-gaap_LongtermDebtTypeAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LongtermDebtTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Longterm Debt Type [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:type="locator" xlink:label="us-gaap_LongtermDebtTypeDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LongtermDebtTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Long-term Debt, Type</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongtermDebtTypeDomain" xlink:to="us-gaap_LongtermDebtTypeDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LongtermDebtTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Longterm Debt Type [Domain]</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_SeniorNotes4250Due2024Member" xlink:type="locator" xlink:label="sf_SeniorNotes4250Due2024Member" />
    <link:label xml:lang="en-US" xlink:label="sf_SeniorNotes4250Due2024Member_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Senior notes 4.250% due 2024.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_SeniorNotes4250Due2024Member" xlink:to="sf_SeniorNotes4250Due2024Member_lbl" />
    <link:label xml:lang="en-US" xlink:label="sf_SeniorNotes4250Due2024Member_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Senior notes 4.25% due 2024 [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_SeniorNotes4250Due2024Member_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Senior Notes4250 Due2024 [Member]</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_SeniorNotes350Due2020Member" xlink:type="locator" xlink:label="sf_SeniorNotes350Due2020Member" />
    <link:label xml:lang="en-US" xlink:label="sf_SeniorNotes350Due2020Member_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Senior notes 3.50% due 2020.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_SeniorNotes350Due2020Member" xlink:to="sf_SeniorNotes350Due2020Member_lbl" />
    <link:label xml:lang="en-US" xlink:label="sf_SeniorNotes350Due2020Member_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Senior notes 3.50% due 2020 [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_SeniorNotes350Due2020Member_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Senior Notes350 Due2020 [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_SeniorNotes520Due2047Member_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Senior notes 5.20% due 2047 [Member]</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_SeniorNotes400Due2030Member" xlink:type="locator" xlink:label="sf_SeniorNotes400Due2030Member" />
    <link:label xml:lang="en-US" xlink:label="sf_SeniorNotes400Due2030Member_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Senior Notes 4.00 Due 2030.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_SeniorNotes400Due2030Member" xlink:to="sf_SeniorNotes400Due2030Member_lbl" />
    <link:label xml:lang="en-US" xlink:label="sf_SeniorNotes400Due2030Member_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Senior notes 4.00% due 2030 [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_SeniorNotes400Due2030Member_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Senior Notes400 Due2030 [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentLineItems" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentLineItems" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt Instrument [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_DebtInstrumentLineItems_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentCarryingAmount" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentCarryingAmount" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentCarryingAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Long-term Debt, gross</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentCarryingAmount" xlink:to="us-gaap_DebtInstrumentCarryingAmount_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentCarryingAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Carrying Amount</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DeferredFinanceCostsNet" xlink:type="locator" xlink:label="us-gaap_DeferredFinanceCostsNet" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DeferredFinanceCostsNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Debt issuance costs, net</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredFinanceCostsNet" xlink:to="us-gaap_DeferredFinanceCostsNet_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DeferredFinanceCostsNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Finance Costs Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LongTermDebt" xlink:type="locator" xlink:label="us-gaap_LongTermDebt" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LongTermDebt_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Senior notes, net</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebt" xlink:to="us-gaap_LongTermDebt_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LongTermDebt_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Long Term Debt</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ScenarioForecastMember" xlink:type="locator" xlink:label="srt_ScenarioForecastMember" />
    <link:label xml:lang="en-US" xlink:label="srt_ScenarioForecastMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Forecast [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_ScenarioForecastMember" xlink:to="srt_ScenarioForecastMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_ScenarioForecastMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Scenario Forecast [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_MeasurementInputTypeAxis" xlink:type="locator" xlink:label="us-gaap_MeasurementInputTypeAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_MeasurementInputTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Measurement Input Type</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MeasurementInputTypeAxis" xlink:to="us-gaap_MeasurementInputTypeAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_MeasurementInputTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input Type [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_MeasurementInputTypeDomain" xlink:type="locator" xlink:label="us-gaap_MeasurementInputTypeDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_MeasurementInputTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Measurement Input Type</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MeasurementInputTypeDomain" xlink:to="us-gaap_MeasurementInputTypeDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_MeasurementInputTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input Type [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_MeasurementInputDiscountRateMember" xlink:type="locator" xlink:label="us-gaap_MeasurementInputDiscountRateMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_MeasurementInputDiscountRateMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Measurement Input, Discount Rate [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MeasurementInputDiscountRateMember" xlink:to="us-gaap_MeasurementInputDiscountRateMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_MeasurementInputDiscountRateMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input Discount Rate [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentRedemptionPeriodAxis" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentRedemptionPeriodAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentRedemptionPeriodAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt Instrument, Redemption, Period</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentRedemptionPeriodAxis" xlink:to="us-gaap_DebtInstrumentRedemptionPeriodAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentRedemptionPeriodAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Redemption Period [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentRedemptionPeriodDomain" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentRedemptionPeriodDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentRedemptionPeriodDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt Instrument, Redemption, Period</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentRedemptionPeriodDomain" xlink:to="us-gaap_DebtInstrumentRedemptionPeriodDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentRedemptionPeriodDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Redemption Period [Domain]</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_AfterFebruaryFifteenTwentyThirtyMember" xlink:type="locator" xlink:label="sf_AfterFebruaryFifteenTwentyThirtyMember" />
    <link:label xml:lang="en-US" xlink:label="sf_AfterFebruaryFifteenTwentyThirtyMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">After February 15, 2030.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_AfterFebruaryFifteenTwentyThirtyMember" xlink:to="sf_AfterFebruaryFifteenTwentyThirtyMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="sf_AfterFebruaryFifteenTwentyThirtyMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">After February 15, 2030 [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_AfterFebruaryFifteenTwentyThirtyMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">After February Fifteen Twenty Thirty [Member]</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_PriorToFebruaryFifteenTwentyThirtyMember" xlink:type="locator" xlink:label="sf_PriorToFebruaryFifteenTwentyThirtyMember" />
    <link:label xml:lang="en-US" xlink:label="sf_PriorToFebruaryFifteenTwentyThirtyMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Prior to February 15, 2030.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_PriorToFebruaryFifteenTwentyThirtyMember" xlink:to="sf_PriorToFebruaryFifteenTwentyThirtyMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="sf_PriorToFebruaryFifteenTwentyThirtyMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Prior to February 15, 2030 [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_PriorToFebruaryFifteenTwentyThirtyMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Prior To February Fifteen Twenty Thirty [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentInterestRateStatedPercentage" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentInterestRateStatedPercentage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stated interest rate</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:to="us-gaap_DebtInstrumentInterestRateStatedPercentage_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentInterestRateStatedPercentage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Interest Rate Stated Percentage</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_RedemptionPricePercentageOfPrincipalAmount" xlink:type="locator" xlink:label="sf_RedemptionPricePercentageOfPrincipalAmount" />
    <link:label xml:lang="en-US" xlink:label="sf_RedemptionPricePercentageOfPrincipalAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Redemption price, percentage of principal amount.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_RedemptionPricePercentageOfPrincipalAmount" xlink:to="sf_RedemptionPricePercentageOfPrincipalAmount_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LongTermDebt_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Long-term Debt</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentMaturityDate" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentMaturityDate" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentMaturityDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Debt instrument, maturity date</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentMaturityDate" xlink:to="us-gaap_DebtInstrumentMaturityDate_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentMaturityDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Maturity Date</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_RedemptionPricePercentageOfPrincipalAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Redemption price, percentage of principal amount</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_RedemptionPricePercentageOfPrincipalAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Redemption Price Percentage Of Principal Amount</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ProceedsFromIssuanceOfLongTermDebt" xlink:type="locator" xlink:label="us-gaap_ProceedsFromIssuanceOfLongTermDebt" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromIssuanceOfLongTermDebt_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Additional issuance of long-term debt</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromIssuanceOfLongTermDebt" xlink:to="us-gaap_ProceedsFromIssuanceOfLongTermDebt_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromIssuanceOfLongTermDebt_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds From Issuance Of Long Term Debt</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_DebtInstrumentTreasuryRateBasisPointsForRedemption" xlink:type="locator" xlink:label="sf_DebtInstrumentTreasuryRateBasisPointsForRedemption" />
    <link:label xml:lang="en-US" xlink:label="sf_DebtInstrumentTreasuryRateBasisPointsForRedemption_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Debt instrument treasury rate basis points for redemption.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_DebtInstrumentTreasuryRateBasisPointsForRedemption" xlink:to="sf_DebtInstrumentTreasuryRateBasisPointsForRedemption_lbl" />
    <link:label xml:lang="en-US" xlink:label="sf_DebtInstrumentTreasuryRateBasisPointsForRedemption_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Redemption at treasury rate basis point</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_DebtInstrumentTreasuryRateBasisPointsForRedemption_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Treasury Rate Basis Points For Redemption</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_NonRecourseDebtMember" xlink:type="locator" xlink:label="sf_NonRecourseDebtMember" />
    <link:label xml:lang="en-US" xlink:label="sf_NonRecourseDebtMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Non recourse debt.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_NonRecourseDebtMember" xlink:to="sf_NonRecourseDebtMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="sf_NonRecourseDebtMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Non Recourse Debt [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_NonRecourseDebtMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Non Recourse Debt [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear" xlink:type="locator" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2020</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear" xlink:to="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Long Term Debt Maturities Repayments Of Principal Remainder Of Fiscal Year</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo" xlink:type="locator" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2021</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo" xlink:to="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Long Term Debt Maturities Repayments Of Principal In Year Two</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree" xlink:type="locator" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2022</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree" xlink:to="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Long Term Debt Maturities Repayments Of Principal In Year Three</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour" xlink:type="locator" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2023</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour" xlink:to="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Long Term Debt Maturities Repayments Of Principal In Year Four</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive" xlink:type="locator" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2024</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive" xlink:to="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Long Term Debt Maturities Repayments Of Principal In Year Five</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive" xlink:type="locator" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Thereafter</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive" xlink:to="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Long Term Debt Maturities Repayments Of Principal After Year Five</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DepositsMoneyMarketDeposits" xlink:type="locator" xlink:label="us-gaap_DepositsMoneyMarketDeposits" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DepositsMoneyMarketDeposits_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Money market and savings accounts</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DepositsMoneyMarketDeposits" xlink:to="us-gaap_DepositsMoneyMarketDeposits_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DepositsMoneyMarketDeposits_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Deposits Money Market Deposits</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InterestBearingDepositLiabilitiesDomestic" xlink:type="locator" xlink:label="us-gaap_InterestBearingDepositLiabilitiesDomestic" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestBearingDepositLiabilitiesDomestic_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Demand deposits (interest-bearing)</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestBearingDepositLiabilitiesDomestic" xlink:to="us-gaap_InterestBearingDepositLiabilitiesDomestic_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestBearingDepositLiabilitiesDomestic_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Interest Bearing Deposit Liabilities Domestic</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NoninterestBearingDepositLiabilitiesDomestic" xlink:type="locator" xlink:label="us-gaap_NoninterestBearingDepositLiabilitiesDomestic" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NoninterestBearingDepositLiabilitiesDomestic_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Demand deposits (non-interest-bearing)</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NoninterestBearingDepositLiabilitiesDomestic" xlink:to="us-gaap_NoninterestBearingDepositLiabilitiesDomestic_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NoninterestBearingDepositLiabilitiesDomestic_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Noninterest Bearing Deposit Liabilities Domestic</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TimeDeposits" xlink:type="locator" xlink:label="us-gaap_TimeDeposits" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TimeDeposits_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Certificates of deposit</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TimeDeposits" xlink:to="us-gaap_TimeDeposits_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TimeDeposits_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Time Deposits</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_Deposits_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Bank deposits</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_BankDepositsLineItems" xlink:type="locator" xlink:label="sf_BankDepositsLineItems" />
    <link:label xml:lang="en-US" xlink:label="sf_BankDepositsLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Bank deposits.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_BankDepositsLineItems" xlink:to="sf_BankDepositsLineItems_lbl" />
    <link:loc xlink:href="sf-20200930.xsd#sf_BankDepositsTable" xlink:type="locator" xlink:label="sf_BankDepositsTable" />
    <link:label xml:lang="en-US" xlink:label="sf_BankDepositsTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Bank deposits.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_BankDepositsTable" xlink:to="sf_BankDepositsTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="sf_BankDepositsTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Bank Deposits [Table]</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_BankDepositsTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Bank Deposits [Table]</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_StifelNicolausMember" xlink:type="locator" xlink:label="sf_StifelNicolausMember" />
    <link:label xml:lang="en-US" xlink:label="sf_StifelNicolausMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Stifel Nicolaus.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_StifelNicolausMember" xlink:to="sf_StifelNicolausMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="sf_StifelNicolausMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stifel Nicolaus [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_StifelNicolausMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Stifel Nicolaus [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RelatedPartyTransactionAxis" xlink:type="locator" xlink:label="us-gaap_RelatedPartyTransactionAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RelatedPartyTransactionAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Related Party Transaction</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RelatedPartyTransactionAxis" xlink:to="us-gaap_RelatedPartyTransactionAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RelatedPartyTransactionAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Transaction [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RelatedPartyTransactionDomain" xlink:type="locator" xlink:label="us-gaap_RelatedPartyTransactionDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RelatedPartyTransactionDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Related Party Transaction</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RelatedPartyTransactionDomain" xlink:to="us-gaap_RelatedPartyTransactionDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RelatedPartyTransactionDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Transaction [Domain]</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_PaymentFromBrokerageCustomersMember" xlink:type="locator" xlink:label="sf_PaymentFromBrokerageCustomersMember" />
    <link:label xml:lang="en-US" xlink:label="sf_PaymentFromBrokerageCustomersMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Payment from brokerage customers.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_PaymentFromBrokerageCustomersMember" xlink:to="sf_PaymentFromBrokerageCustomersMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="sf_PaymentFromBrokerageCustomersMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Brokerage Customers Deposits [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_PaymentFromBrokerageCustomersMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Payment From Brokerage Customers [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_BankDepositsLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Bank Deposits [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_BankDepositsLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Bank Deposits [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_WeightedAverageRateDomesticDepositTimeDeposits" xlink:type="locator" xlink:label="us-gaap_WeightedAverageRateDomesticDepositTimeDeposits" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_WeightedAverageRateDomesticDepositTimeDeposits_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted average interest rate on deposits</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_WeightedAverageRateDomesticDepositTimeDeposits" xlink:to="us-gaap_WeightedAverageRateDomesticDepositTimeDeposits_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_WeightedAverageRateDomesticDepositTimeDeposits_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Weighted Average Rate Domestic Deposit Time Deposits</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_TimeDepositMaturitiesLessThanOneHundredThousandNextRollingTwelveMonths" xlink:type="locator" xlink:label="sf_TimeDepositMaturitiesLessThanOneHundredThousandNextRollingTwelveMonths" />
    <link:label xml:lang="en-US" xlink:label="sf_TimeDepositMaturitiesLessThanOneHundredThousandNextRollingTwelveMonths_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Time deposit maturities, less than one hundred thousand, next rolling twelve months.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_TimeDepositMaturitiesLessThanOneHundredThousandNextRollingTwelveMonths" xlink:to="sf_TimeDepositMaturitiesLessThanOneHundredThousandNextRollingTwelveMonths_lbl" />
    <link:loc xlink:href="sf-20200930.xsd#sf_TimeDepositMaturitiesLessThanOneHundredThousandRollingYearsOneToThree" xlink:type="locator" xlink:label="sf_TimeDepositMaturitiesLessThanOneHundredThousandRollingYearsOneToThree" />
    <link:label xml:lang="en-US" xlink:label="sf_TimeDepositMaturitiesLessThanOneHundredThousandRollingYearsOneToThree_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Time deposit maturities, less than one hundred thousand, rolling years one to three.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_TimeDepositMaturitiesLessThanOneHundredThousandRollingYearsOneToThree" xlink:to="sf_TimeDepositMaturitiesLessThanOneHundredThousandRollingYearsOneToThree_lbl" />
    <link:loc xlink:href="sf-20200930.xsd#sf_TimeDepositMaturitiesLessThanOneHundredThousandOverThreeRollingYears" xlink:type="locator" xlink:label="sf_TimeDepositMaturitiesLessThanOneHundredThousandOverThreeRollingYears" />
    <link:label xml:lang="en-US" xlink:label="sf_TimeDepositMaturitiesLessThanOneHundredThousandOverThreeRollingYears_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Time deposit maturities, less than one hundred thousand, over three rolling years.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_TimeDepositMaturitiesLessThanOneHundredThousandOverThreeRollingYears" xlink:to="sf_TimeDepositMaturitiesLessThanOneHundredThousandOverThreeRollingYears_lbl" />
    <link:loc xlink:href="sf-20200930.xsd#sf_TimeDepositMaturitiesOneHundredThousandOrMoreNextRollingTwelveMonths" xlink:type="locator" xlink:label="sf_TimeDepositMaturitiesOneHundredThousandOrMoreNextRollingTwelveMonths" />
    <link:label xml:lang="en-US" xlink:label="sf_TimeDepositMaturitiesOneHundredThousandOrMoreNextRollingTwelveMonths_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Time deposit maturities, one hundred thousand or more, next rolling twelve months.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_TimeDepositMaturitiesOneHundredThousandOrMoreNextRollingTwelveMonths" xlink:to="sf_TimeDepositMaturitiesOneHundredThousandOrMoreNextRollingTwelveMonths_lbl" />
    <link:loc xlink:href="sf-20200930.xsd#sf_TimeDepositMaturitiesOneHundredThousandOrMoreRollingOneToThreeYears" xlink:type="locator" xlink:label="sf_TimeDepositMaturitiesOneHundredThousandOrMoreRollingOneToThreeYears" />
    <link:label xml:lang="en-US" xlink:label="sf_TimeDepositMaturitiesOneHundredThousandOrMoreRollingOneToThreeYears_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Time deposit maturities, one hundred thousand or more, rolling one to three years.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_TimeDepositMaturitiesOneHundredThousandOrMoreRollingOneToThreeYears" xlink:to="sf_TimeDepositMaturitiesOneHundredThousandOrMoreRollingOneToThreeYears_lbl" />
    <link:loc xlink:href="sf-20200930.xsd#sf_TimeDepositMaturitiesOneHundredThousandOrMoreOverThreeRollingYears" xlink:type="locator" xlink:label="sf_TimeDepositMaturitiesOneHundredThousandOrMoreOverThreeRollingYears" />
    <link:label xml:lang="en-US" xlink:label="sf_TimeDepositMaturitiesOneHundredThousandOrMoreOverThreeRollingYears_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Time deposit maturities, one hundred thousand or more, over three rolling years.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_TimeDepositMaturitiesOneHundredThousandOrMoreOverThreeRollingYears" xlink:to="sf_TimeDepositMaturitiesOneHundredThousandOrMoreOverThreeRollingYears_lbl" />
    <link:label xml:lang="en-US" xlink:label="sf_TimeDepositMaturitiesLessThanOneHundredThousandNextRollingTwelveMonths_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Within one year</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_TimeDepositMaturitiesLessThanOneHundredThousandNextRollingTwelveMonths_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Time Deposit Maturities Less Than One Hundred Thousand Next Rolling Twelve Months</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_TimeDepositMaturitiesLessThanOneHundredThousandRollingYearsOneToThree_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">One to three years</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_TimeDepositMaturitiesLessThanOneHundredThousandRollingYearsOneToThree_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Time Deposit Maturities Less Than One Hundred Thousand Rolling Years One To Three</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_TimeDepositMaturitiesLessThanOneHundredThousandOverThreeRollingYears_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Three to five years</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_TimeDepositMaturitiesLessThanOneHundredThousandOverThreeRollingYears_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Time Deposit Maturities Less Than One Hundred Thousand Over Three Rolling Years</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TimeDepositsLessThan100000" xlink:type="locator" xlink:label="us-gaap_TimeDepositsLessThan100000" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TimeDepositsLessThan100000_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Certificates of deposit, less than $100,000</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TimeDepositsLessThan100000" xlink:to="us-gaap_TimeDepositsLessThan100000_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TimeDepositsLessThan100000_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Time Deposits Less Than100000</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_TimeDepositMaturitiesOneHundredThousandOrMoreNextRollingTwelveMonths_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Within one year</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_TimeDepositMaturitiesOneHundredThousandOrMoreNextRollingTwelveMonths_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Time Deposit Maturities One Hundred Thousand Or More Next Rolling Twelve Months</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_TimeDepositMaturitiesOneHundredThousandOrMoreRollingOneToThreeYears_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">One to three years</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_TimeDepositMaturitiesOneHundredThousandOrMoreRollingOneToThreeYears_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Time Deposit Maturities One Hundred Thousand Or More Rolling One To Three Years</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_TimeDepositMaturitiesOneHundredThousandOrMoreOverThreeRollingYears_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Three to five years</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_TimeDepositMaturitiesOneHundredThousandOrMoreOverThreeRollingYears_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Time Deposit Maturities One Hundred Thousand Or More Over Three Rolling Years</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TimeDeposits100000OrMore" xlink:type="locator" xlink:label="us-gaap_TimeDeposits100000OrMore" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TimeDeposits100000OrMore_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Certificates of deposit, $100,000 and greater</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TimeDeposits100000OrMore" xlink:to="us-gaap_TimeDeposits100000OrMore_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TimeDeposits100000OrMore_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Time Deposits100000 Or More</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_TimeDeposits_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total certificates of deposit</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_InterestBearingAndTimeDepositOfOfficials" xlink:type="locator" xlink:label="sf_InterestBearingAndTimeDepositOfOfficials" />
    <link:label xml:lang="en-US" xlink:label="sf_InterestBearingAndTimeDepositOfOfficials_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Interest bearing and time deposit of officials.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_InterestBearingAndTimeDepositOfOfficials" xlink:to="sf_InterestBearingAndTimeDepositOfOfficials_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RelatedPartyDepositLiabilities" xlink:type="locator" xlink:label="us-gaap_RelatedPartyDepositLiabilities" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RelatedPartyDepositLiabilities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deposits of related parties</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RelatedPartyDepositLiabilities" xlink:to="us-gaap_RelatedPartyDepositLiabilities_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RelatedPartyDepositLiabilities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Deposit Liabilities</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_InterestBearingAndTimeDepositOfOfficials_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest bearing and time deposits of executive officers, directors, and affiliates</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_InterestBearingAndTimeDepositOfOfficials_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Interest Bearing And Time Deposit Of Officials</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_SecuritiesBorrowedGrossAmountsOffset" xlink:type="locator" xlink:label="sf_SecuritiesBorrowedGrossAmountsOffset" />
    <link:label xml:lang="en-US" xlink:label="sf_SecuritiesBorrowedGrossAmountsOffset_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Securities borrowed gross amounts offset.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_SecuritiesBorrowedGrossAmountsOffset" xlink:to="sf_SecuritiesBorrowedGrossAmountsOffset_lbl" />
    <link:loc xlink:href="sf-20200930.xsd#sf_SecuritiesBorrowedAmountNotOffsetAgainstCollateral" xlink:type="locator" xlink:label="sf_SecuritiesBorrowedAmountNotOffsetAgainstCollateral" />
    <link:label xml:lang="en-US" xlink:label="sf_SecuritiesBorrowedAmountNotOffsetAgainstCollateral_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Securities borrowed, amount not offset against collateral.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_SecuritiesBorrowedAmountNotOffsetAgainstCollateral" xlink:to="sf_SecuritiesBorrowedAmountNotOffsetAgainstCollateral_lbl" />
    <link:loc xlink:href="sf-20200930.xsd#sf_SecuritiesBorrowedNetAmount" xlink:type="locator" xlink:label="sf_SecuritiesBorrowedNetAmount" />
    <link:label xml:lang="en-US" xlink:label="sf_SecuritiesBorrowedNetAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Securities borrowed, net amount.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_SecuritiesBorrowedNetAmount" xlink:to="sf_SecuritiesBorrowedNetAmount_lbl" />
    <link:loc xlink:href="sf-20200930.xsd#sf_OffsettingAssetsNetAmount" xlink:type="locator" xlink:label="sf_OffsettingAssetsNetAmount" />
    <link:label xml:lang="en-US" xlink:label="sf_OffsettingAssetsNetAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Offsetting assets, net amount.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_OffsettingAssetsNetAmount" xlink:to="sf_OffsettingAssetsNetAmount_lbl" />
    <link:loc xlink:href="sf-20200930.xsd#sf_OffsettingAssets" xlink:type="locator" xlink:label="sf_OffsettingAssets" />
    <link:label xml:lang="en-US" xlink:label="sf_OffsettingAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Offsetting assets.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_OffsettingAssets" xlink:to="sf_OffsettingAssets_lbl" />
    <link:loc xlink:href="sf-20200930.xsd#sf_OffsettingAssetsAmountsNotOffset" xlink:type="locator" xlink:label="sf_OffsettingAssetsAmountsNotOffset" />
    <link:label xml:lang="en-US" xlink:label="sf_OffsettingAssetsAmountsNotOffset_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Offsetting assets, amounts not offset.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_OffsettingAssetsAmountsNotOffset" xlink:to="sf_OffsettingAssetsAmountsNotOffset_lbl" />
    <link:loc xlink:href="sf-20200930.xsd#sf_OffsettingAssetsCollateralReceived" xlink:type="locator" xlink:label="sf_OffsettingAssetsCollateralReceived" />
    <link:label xml:lang="en-US" xlink:label="sf_OffsettingAssetsCollateralReceived_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Offsetting assets, collateral received.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_OffsettingAssetsCollateralReceived" xlink:to="sf_OffsettingAssetsCollateralReceived_lbl" />
    <link:loc xlink:href="sf-20200930.xsd#sf_OffsettingAssetsGrossAmountsOfRecognizedAssets" xlink:type="locator" xlink:label="sf_OffsettingAssetsGrossAmountsOfRecognizedAssets" />
    <link:label xml:lang="en-US" xlink:label="sf_OffsettingAssetsGrossAmountsOfRecognizedAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Offsetting assets gross amounts of recognized assets.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_OffsettingAssetsGrossAmountsOfRecognizedAssets" xlink:to="sf_OffsettingAssetsGrossAmountsOfRecognizedAssets_lbl" />
    <link:loc xlink:href="sf-20200930.xsd#sf_OffsettingAssetsGrossAmountsOffset" xlink:type="locator" xlink:label="sf_OffsettingAssetsGrossAmountsOffset" />
    <link:label xml:lang="en-US" xlink:label="sf_OffsettingAssetsGrossAmountsOffset_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Offsetting assets, Gross amounts of recognized assets.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_OffsettingAssetsGrossAmountsOffset" xlink:to="sf_OffsettingAssetsGrossAmountsOffset_lbl" />
    <link:loc xlink:href="sf-20200930.xsd#sf_CashFlowInterestRateContractsAssetNetAmount" xlink:type="locator" xlink:label="sf_CashFlowInterestRateContractsAssetNetAmount" />
    <link:label xml:lang="en-US" xlink:label="sf_CashFlowInterestRateContractsAssetNetAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Cash flow interest rate contracts asset net amount.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_CashFlowInterestRateContractsAssetNetAmount" xlink:to="sf_CashFlowInterestRateContractsAssetNetAmount_lbl" />
    <link:loc xlink:href="sf-20200930.xsd#sf_DerivativeLiabilityFairValueAmountOffsetAgainstCollateral" xlink:type="locator" xlink:label="sf_DerivativeLiabilityFairValueAmountOffsetAgainstCollateral" />
    <link:label xml:lang="en-US" xlink:label="sf_DerivativeLiabilityFairValueAmountOffsetAgainstCollateral_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Derivative liability fair value amount offset against collateral.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_DerivativeLiabilityFairValueAmountOffsetAgainstCollateral" xlink:to="sf_DerivativeLiabilityFairValueAmountOffsetAgainstCollateral_lbl" />
    <link:loc xlink:href="sf-20200930.xsd#sf_SecuritiesPurchasedUnderAgreementsToResellNetAmount" xlink:type="locator" xlink:label="sf_SecuritiesPurchasedUnderAgreementsToResellNetAmount" />
    <link:label xml:lang="en-US" xlink:label="sf_SecuritiesPurchasedUnderAgreementsToResellNetAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Securities purchased under agreements to resell, net amount.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_SecuritiesPurchasedUnderAgreementsToResellNetAmount" xlink:to="sf_SecuritiesPurchasedUnderAgreementsToResellNetAmount_lbl" />
    <link:loc xlink:href="sf-20200930.xsd#sf_SecuritiesPurchasedUnderAgreementsToResellAmountsNotOffset" xlink:type="locator" xlink:label="sf_SecuritiesPurchasedUnderAgreementsToResellAmountsNotOffset" />
    <link:label xml:lang="en-US" xlink:label="sf_SecuritiesPurchasedUnderAgreementsToResellAmountsNotOffset_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Securities purchased under agreements to resell, amounts not offset.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_SecuritiesPurchasedUnderAgreementsToResellAmountsNotOffset" xlink:to="sf_SecuritiesPurchasedUnderAgreementsToResellAmountsNotOffset_lbl" />
    <link:loc xlink:href="sf-20200930.xsd#sf_SecuritiesPurchasedUnderAgreementsToGrossAmountsOffset" xlink:type="locator" xlink:label="sf_SecuritiesPurchasedUnderAgreementsToGrossAmountsOffset" />
    <link:label xml:lang="en-US" xlink:label="sf_SecuritiesPurchasedUnderAgreementsToGrossAmountsOffset_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Securities purchased under agreements to gross amounts offset.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_SecuritiesPurchasedUnderAgreementsToGrossAmountsOffset" xlink:to="sf_SecuritiesPurchasedUnderAgreementsToGrossAmountsOffset_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SecuritiesBorrowedGross" xlink:type="locator" xlink:label="us-gaap_SecuritiesBorrowedGross" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SecuritiesBorrowedGross_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gross amounts of recognized assets, Securities borrowing</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SecuritiesBorrowedGross" xlink:to="us-gaap_SecuritiesBorrowedGross_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SecuritiesBorrowedGross_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Securities Borrowed Gross</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_SecuritiesBorrowedGrossAmountsOffset_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gross amounts offset in the Statement of Financial Condition, Securities borrowing</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_SecuritiesBorrowedGrossAmountsOffset_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Securities Borrowed Gross Amounts Offset</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SecuritiesBorrowed" xlink:type="locator" xlink:label="us-gaap_SecuritiesBorrowed" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SecuritiesBorrowed_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net amounts presented in the Statement of Financial Condition, Securities borrowing</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SecuritiesBorrowed" xlink:to="us-gaap_SecuritiesBorrowed_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SecuritiesBorrowed_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Securities Borrowed</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_SecuritiesBorrowedAmountNotOffsetAgainstCollateral_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gross amounts not offset in the Statement of Financial Position, Financial instruments, Securities borrowing</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_SecuritiesBorrowedAmountNotOffsetAgainstCollateral_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Securities Borrowed Amount Not Offset Against Collateral</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SecuritiesBorrowedFairValueOfCollateral" xlink:type="locator" xlink:label="us-gaap_SecuritiesBorrowedFairValueOfCollateral" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SecuritiesBorrowedFairValueOfCollateral_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Gross amounts not offset in the Statement of Financial Position, Collateral received, Securities borrowing</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SecuritiesBorrowedFairValueOfCollateral" xlink:to="us-gaap_SecuritiesBorrowedFairValueOfCollateral_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SecuritiesBorrowedFairValueOfCollateral_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Securities Borrowed Fair Value Of Collateral</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_SecuritiesBorrowedNetAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Securities borrowed, Net amount</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_SecuritiesBorrowedNetAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Securities Borrowed Net Amount</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SecuritiesPurchasedUnderAgreementsToResellGross" xlink:type="locator" xlink:label="us-gaap_SecuritiesPurchasedUnderAgreementsToResellGross" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SecuritiesPurchasedUnderAgreementsToResellGross_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gross amounts of recognized assets, Reverse repurchase agreements</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SecuritiesPurchasedUnderAgreementsToResellGross" xlink:to="us-gaap_SecuritiesPurchasedUnderAgreementsToResellGross_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SecuritiesPurchasedUnderAgreementsToResellGross_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Securities Purchased Under Agreements To Resell Gross</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_SecuritiesPurchasedUnderAgreementsToGrossAmountsOffset_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gross amounts offset in the statement of Financial Condition, Securities purchased under agreements to resell</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_SecuritiesPurchasedUnderAgreementsToGrossAmountsOffset_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Securities Purchased Under Agreements To Gross Amounts Offset</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_SecuritiesPurchasedUnderAgreementsToResell_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net amounts presented in the Statement of Financial Condition, Securities purchased under agreements to resell</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_SecuritiesPurchasedUnderAgreementsToResellAmountsNotOffset_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gross amounts not offset in the Statement of Financial Position, Financial instruments, Securities purchased under agreements to resell</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_SecuritiesPurchasedUnderAgreementsToResellAmountsNotOffset_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Securities Purchased Under Agreements To Resell Amounts Not Offset</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SecuritiesPurchasedUnderAgreementsToResellFairValueOfCollateral" xlink:type="locator" xlink:label="us-gaap_SecuritiesPurchasedUnderAgreementsToResellFairValueOfCollateral" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SecuritiesPurchasedUnderAgreementsToResellFairValueOfCollateral_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Gross amounts not offset in the Statement of Financial Position, Collateral received, Securities purchased under agreements to resell</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SecuritiesPurchasedUnderAgreementsToResellFairValueOfCollateral" xlink:to="us-gaap_SecuritiesPurchasedUnderAgreementsToResellFairValueOfCollateral_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SecuritiesPurchasedUnderAgreementsToResellFairValueOfCollateral_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Securities Purchased Under Agreements To Resell Fair Value Of Collateral</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_SecuritiesPurchasedUnderAgreementsToResellNetAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Securities purchased under agreements to resell, Net amount</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_SecuritiesPurchasedUnderAgreementsToResellNetAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Securities Purchased Under Agreements To Resell Net Amount</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeFairValueOfDerivativeAsset" xlink:type="locator" xlink:label="us-gaap_DerivativeFairValueOfDerivativeAsset" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DerivativeFairValueOfDerivativeAsset_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gross amounts of recognized assets, Cash flow interest rate contracts</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeFairValueOfDerivativeAsset" xlink:to="us-gaap_DerivativeFairValueOfDerivativeAsset_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DerivativeFairValueOfDerivativeAsset_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Derivative Fair Value Of Derivative Asset</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_DerivativeLiabilityFairValueAmountOffsetAgainstCollateral_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gross amounts offset in the Statement of Financial Condition, Cash flow interest rate contracts</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_DerivativeLiabilityFairValueAmountOffsetAgainstCollateral_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Derivative Liability Fair Value Amount Offset Against Collateral</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_DerivativeAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net amounts presented in the Statement of Financial Condition, Cash flow interest rate contracts</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral" xlink:type="locator" xlink:label="us-gaap_DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gross amounts not offset in the Statement of Financial Position, Financial instruments, Cash flow interest rate contracts</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral" xlink:to="us-gaap_DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Derivative Fair Value Of Derivative Asset Amount Not Offset Against Collateral</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeAssetFairValueOfCollateral" xlink:type="locator" xlink:label="us-gaap_DerivativeAssetFairValueOfCollateral" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DerivativeAssetFairValueOfCollateral_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gross amounts not offset in the Statement of Financial Position, Collateral pledged, Cash flow interest rate contracts</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeAssetFairValueOfCollateral" xlink:to="us-gaap_DerivativeAssetFairValueOfCollateral_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DerivativeAssetFairValueOfCollateral_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Derivative Asset Fair Value Of Collateral</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_CashFlowInterestRateContractsAssetNetAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Cash flow interest rate contracts, Net amount</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_CashFlowInterestRateContractsAssetNetAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Cash Flow Interest Rate Contracts Asset Net Amount</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_OffsettingAssetsGrossAmountsOfRecognizedAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gross amounts of recognized assets</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_OffsettingAssetsGrossAmountsOfRecognizedAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Offsetting Assets Gross Amounts Of Recognized Assets</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_OffsettingAssetsGrossAmountsOffset_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gross amounts offset in the Statement of Financial Condition</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_OffsettingAssetsGrossAmountsOffset_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Offsetting Assets Gross Amounts Offset</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_OffsettingAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net amounts presented in the Statements of Financial Condition</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_OffsettingAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Offsetting Assets</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_OffsettingAssetsAmountsNotOffset_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gross amounts not offset in the Statement of Financial Position</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_OffsettingAssetsAmountsNotOffset_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Offsetting Assets Amounts Not Offset</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_OffsettingAssetsCollateralReceived_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Gross amounts not offset in the Statement of Financial Position, Collateral received</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_OffsettingAssetsCollateralReceived_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Offsetting Assets Collateral Received</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_OffsettingAssetsNetAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net amount</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_OffsettingAssetsNetAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Offsetting Assets Net Amount</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OffsettingAssetsTable" xlink:type="locator" xlink:label="us-gaap_OffsettingAssetsTable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OffsettingAssetsTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Offsetting Assets [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OffsettingAssetsTable" xlink:to="us-gaap_OffsettingAssetsTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OffsettingAssetsTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Offsetting Assets [Table]</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_FairValueOfSecuritiesPledgedAsCollateralMember" xlink:type="locator" xlink:label="sf_FairValueOfSecuritiesPledgedAsCollateralMember" />
    <link:label xml:lang="en-US" xlink:label="sf_FairValueOfSecuritiesPledgedAsCollateralMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Fair value of securities pledged as collateral.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_FairValueOfSecuritiesPledgedAsCollateralMember" xlink:to="sf_FairValueOfSecuritiesPledgedAsCollateralMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="sf_FairValueOfSecuritiesPledgedAsCollateralMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value Of Securities Pledged As Collateral [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_FairValueOfSecuritiesPledgedAsCollateralMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Of Securities Pledged As Collateral [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OffsettingAssetsLineItems" xlink:type="locator" xlink:label="us-gaap_OffsettingAssetsLineItems" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OffsettingAssetsLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Offsetting Assets [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OffsettingAssetsLineItems" xlink:to="us-gaap_OffsettingAssetsLineItems_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OffsettingAssetsLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Offsetting Assets [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_SecuritiesPurchasedUnderAgreementsToResellFairValueOfCollateral_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Fair value of securities pledged as collateral</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_SecuritiesLoanedGrossAmountsOffset" xlink:type="locator" xlink:label="sf_SecuritiesLoanedGrossAmountsOffset" />
    <link:label xml:lang="en-US" xlink:label="sf_SecuritiesLoanedGrossAmountsOffset_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Securities loaned gross amounts offset.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_SecuritiesLoanedGrossAmountsOffset" xlink:to="sf_SecuritiesLoanedGrossAmountsOffset_lbl" />
    <link:loc xlink:href="sf-20200930.xsd#sf_SecuritiesLoanedAmountNotOffsetAgainstCollateral" xlink:type="locator" xlink:label="sf_SecuritiesLoanedAmountNotOffsetAgainstCollateral" />
    <link:label xml:lang="en-US" xlink:label="sf_SecuritiesLoanedAmountNotOffsetAgainstCollateral_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Securities loaned amount not offset against collateral.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_SecuritiesLoanedAmountNotOffsetAgainstCollateral" xlink:to="sf_SecuritiesLoanedAmountNotOffsetAgainstCollateral_lbl" />
    <link:loc xlink:href="sf-20200930.xsd#sf_SecuritiesLoanedNetAmount" xlink:type="locator" xlink:label="sf_SecuritiesLoanedNetAmount" />
    <link:label xml:lang="en-US" xlink:label="sf_SecuritiesLoanedNetAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Securities loaned, net amount.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_SecuritiesLoanedNetAmount" xlink:to="sf_SecuritiesLoanedNetAmount_lbl" />
    <link:loc xlink:href="sf-20200930.xsd#sf_OffsettingLiabilitiesNetAmount" xlink:type="locator" xlink:label="sf_OffsettingLiabilitiesNetAmount" />
    <link:label xml:lang="en-US" xlink:label="sf_OffsettingLiabilitiesNetAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Offsetting liabilities, net amount.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_OffsettingLiabilitiesNetAmount" xlink:to="sf_OffsettingLiabilitiesNetAmount_lbl" />
    <link:loc xlink:href="sf-20200930.xsd#sf_OffsettingLiabilitiesNetAmountsPresentedInStatementOfFinancialCondition" xlink:type="locator" xlink:label="sf_OffsettingLiabilitiesNetAmountsPresentedInStatementOfFinancialCondition" />
    <link:label xml:lang="en-US" xlink:label="sf_OffsettingLiabilitiesNetAmountsPresentedInStatementOfFinancialCondition_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Offsetting liabilities, net amounts presented in the statement of financial condition.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_OffsettingLiabilitiesNetAmountsPresentedInStatementOfFinancialCondition" xlink:to="sf_OffsettingLiabilitiesNetAmountsPresentedInStatementOfFinancialCondition_lbl" />
    <link:loc xlink:href="sf-20200930.xsd#sf_OffsettingLiabilitiesAmountsNotOffset" xlink:type="locator" xlink:label="sf_OffsettingLiabilitiesAmountsNotOffset" />
    <link:label xml:lang="en-US" xlink:label="sf_OffsettingLiabilitiesAmountsNotOffset_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Offsetting liabilities amounts not offset.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_OffsettingLiabilitiesAmountsNotOffset" xlink:to="sf_OffsettingLiabilitiesAmountsNotOffset_lbl" />
    <link:loc xlink:href="sf-20200930.xsd#sf_OffsettingLiabilitiesCollateralPledged" xlink:type="locator" xlink:label="sf_OffsettingLiabilitiesCollateralPledged" />
    <link:label xml:lang="en-US" xlink:label="sf_OffsettingLiabilitiesCollateralPledged_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Offsetting liabilities, collateral pledged.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_OffsettingLiabilitiesCollateralPledged" xlink:to="sf_OffsettingLiabilitiesCollateralPledged_lbl" />
    <link:loc xlink:href="sf-20200930.xsd#sf_OffsettingLiabilitiesGrossAmountsOfRecognizedLiabilities" xlink:type="locator" xlink:label="sf_OffsettingLiabilitiesGrossAmountsOfRecognizedLiabilities" />
    <link:label xml:lang="en-US" xlink:label="sf_OffsettingLiabilitiesGrossAmountsOfRecognizedLiabilities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Offsetting liabilities, gross amounts of recognized liabilities.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_OffsettingLiabilitiesGrossAmountsOfRecognizedLiabilities" xlink:to="sf_OffsettingLiabilitiesGrossAmountsOfRecognizedLiabilities_lbl" />
    <link:loc xlink:href="sf-20200930.xsd#sf_OffsettingLiabilitiesGrossAmountsOffset" xlink:type="locator" xlink:label="sf_OffsettingLiabilitiesGrossAmountsOffset" />
    <link:label xml:lang="en-US" xlink:label="sf_OffsettingLiabilitiesGrossAmountsOffset_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Offsetting liabilities gross amounts offset.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_OffsettingLiabilitiesGrossAmountsOffset" xlink:to="sf_OffsettingLiabilitiesGrossAmountsOffset_lbl" />
    <link:loc xlink:href="sf-20200930.xsd#sf_SecuritiesSoldUnderAgreementsToRepurchaseNetAmount" xlink:type="locator" xlink:label="sf_SecuritiesSoldUnderAgreementsToRepurchaseNetAmount" />
    <link:label xml:lang="en-US" xlink:label="sf_SecuritiesSoldUnderAgreementsToRepurchaseNetAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Securities sold under agreements to repurchase, net amount.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_SecuritiesSoldUnderAgreementsToRepurchaseNetAmount" xlink:to="sf_SecuritiesSoldUnderAgreementsToRepurchaseNetAmount_lbl" />
    <link:loc xlink:href="sf-20200930.xsd#sf_SecuritiesSoldUnderAgreementsToRepurchaseAmountNotOffset" xlink:type="locator" xlink:label="sf_SecuritiesSoldUnderAgreementsToRepurchaseAmountNotOffset" />
    <link:label xml:lang="en-US" xlink:label="sf_SecuritiesSoldUnderAgreementsToRepurchaseAmountNotOffset_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Securities sold under agreements to repurchase amount not offset.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_SecuritiesSoldUnderAgreementsToRepurchaseAmountNotOffset" xlink:to="sf_SecuritiesSoldUnderAgreementsToRepurchaseAmountNotOffset_lbl" />
    <link:loc xlink:href="sf-20200930.xsd#sf_SecuritiesSoldUnderAgreementsToRepurchaseGrossAmountsOffset" xlink:type="locator" xlink:label="sf_SecuritiesSoldUnderAgreementsToRepurchaseGrossAmountsOffset" />
    <link:label xml:lang="en-US" xlink:label="sf_SecuritiesSoldUnderAgreementsToRepurchaseGrossAmountsOffset_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Securities sold under agreements to repurchase gross amounts offset.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_SecuritiesSoldUnderAgreementsToRepurchaseGrossAmountsOffset" xlink:to="sf_SecuritiesSoldUnderAgreementsToRepurchaseGrossAmountsOffset_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SecuritiesLoanedGross" xlink:type="locator" xlink:label="us-gaap_SecuritiesLoanedGross" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SecuritiesLoanedGross_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Gross amounts of recognized liabilities, Securities lending</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SecuritiesLoanedGross" xlink:to="us-gaap_SecuritiesLoanedGross_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SecuritiesLoanedGross_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Securities Loaned Gross</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_SecuritiesLoanedGrossAmountsOffset_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Securities Loaned, Amount Offset Against Collateral</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_SecuritiesLoanedGrossAmountsOffset_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Securities Loaned Gross Amounts Offset</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SecuritiesLoaned" xlink:type="locator" xlink:label="us-gaap_SecuritiesLoaned" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SecuritiesLoaned_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedTotalLabel">Net amounts presented in the Statement of Financial Condition, Securities lending</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SecuritiesLoaned" xlink:to="us-gaap_SecuritiesLoaned_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SecuritiesLoaned_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Securities Loaned</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_SecuritiesLoanedAmountNotOffsetAgainstCollateral_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Gross amounts not offset in the Statement of Financial Position, Financial instruments, Securities lending</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_SecuritiesLoanedAmountNotOffsetAgainstCollateral_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Securities Loaned Amount Not Offset Against Collateral</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SecuritiesLoanedFairValueOfCollateral" xlink:type="locator" xlink:label="us-gaap_SecuritiesLoanedFairValueOfCollateral" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SecuritiesLoanedFairValueOfCollateral_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gross amounts not offset in the Statement of Financial Position, Collateral pledged, Securities lending</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SecuritiesLoanedFairValueOfCollateral" xlink:to="us-gaap_SecuritiesLoanedFairValueOfCollateral_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SecuritiesLoanedFairValueOfCollateral_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Securities Loaned Fair Value Of Collateral</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_SecuritiesLoanedNetAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedTotalLabel">Securities lending, Net amount</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_SecuritiesLoanedNetAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Securities Loaned Net Amount</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SecuritiesSoldUnderAgreementsToRepurchaseGross" xlink:type="locator" xlink:label="us-gaap_SecuritiesSoldUnderAgreementsToRepurchaseGross" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SecuritiesSoldUnderAgreementsToRepurchaseGross_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Gross amounts of recognized liabilities, Securities purchased under agreements to resell</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SecuritiesSoldUnderAgreementsToRepurchaseGross" xlink:to="us-gaap_SecuritiesSoldUnderAgreementsToRepurchaseGross_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SecuritiesSoldUnderAgreementsToRepurchaseGross_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Securities Sold Under Agreements To Repurchase Gross</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_SecuritiesSoldUnderAgreementsToRepurchaseGrossAmountsOffset_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Securities Sold under Agreements to Repurchase, Amount Offset Against Collateral</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_SecuritiesSoldUnderAgreementsToRepurchaseGrossAmountsOffset_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Securities Sold Under Agreements To Repurchase Gross Amounts Offset</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_SecuritiesSoldUnderAgreementsToRepurchase_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedTotalLabel">Net amounts presented in the Statement of Financial Condition, Securities purchased under agreements to resell</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_SecuritiesSoldUnderAgreementsToRepurchaseAmountNotOffset_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gross amounts not offset in the Statement of Financial Position, Financial instruments, Securities purchased under agreements to resell</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_SecuritiesSoldUnderAgreementsToRepurchaseAmountNotOffset_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Securities Sold Under Agreements To Repurchase Amount Not Offset</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SecuritiesSoldUnderAgreementsToRepurchaseFairValueOfCollateral" xlink:type="locator" xlink:label="us-gaap_SecuritiesSoldUnderAgreementsToRepurchaseFairValueOfCollateral" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SecuritiesSoldUnderAgreementsToRepurchaseFairValueOfCollateral_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gross amounts not offset in the Statement of Financial Position, Collateral pledged, Securities purchased under agreements to resell</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SecuritiesSoldUnderAgreementsToRepurchaseFairValueOfCollateral" xlink:to="us-gaap_SecuritiesSoldUnderAgreementsToRepurchaseFairValueOfCollateral_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SecuritiesSoldUnderAgreementsToRepurchaseFairValueOfCollateral_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Securities Sold Under Agreements To Repurchase Fair Value Of Collateral</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_SecuritiesSoldUnderAgreementsToRepurchaseNetAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedTotalLabel">Securities purchased under agreements to repurchase, Net amount</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_SecuritiesSoldUnderAgreementsToRepurchaseNetAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Securities Sold Under Agreements To Repurchase Net Amount</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_OffsettingLiabilitiesGrossAmountsOfRecognizedLiabilities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Gross amounts of recognized liabilities</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_OffsettingLiabilitiesGrossAmountsOfRecognizedLiabilities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Offsetting Liabilities Gross Amounts Of Recognized Liabilities</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_OffsettingLiabilitiesGrossAmountsOffset_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Gross amounts offset in the Statement of Financial Condition</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_OffsettingLiabilitiesGrossAmountsOffset_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Offsetting Liabilities Gross Amounts Offset</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_OffsettingLiabilitiesNetAmountsPresentedInStatementOfFinancialCondition_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedTotalLabel">Net amounts presented in the Statement of Financial Condition</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_OffsettingLiabilitiesNetAmountsPresentedInStatementOfFinancialCondition_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Offsetting Liabilities Net Amounts Presented In Statement Of Financial Condition</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_OffsettingLiabilitiesAmountsNotOffset_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Gross amounts not offset in the Statement of Financial Position, Financial instruments</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_OffsettingLiabilitiesAmountsNotOffset_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Offsetting Liabilities Amounts Not Offset</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_OffsettingLiabilitiesCollateralPledged_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gross amounts not offset in the Statement of Financial Condition, Collateral pledged</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_OffsettingLiabilitiesCollateralPledged_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Offsetting Liabilities Collateral Pledged</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_OffsettingLiabilitiesNetAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedTotalLabel">Net amount</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_OffsettingLiabilitiesNetAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Offsetting Liabilities Net Amount</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OffsettingLiabilitiesTable" xlink:type="locator" xlink:label="us-gaap_OffsettingLiabilitiesTable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OffsettingLiabilitiesTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Offsetting Liabilities [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OffsettingLiabilitiesTable" xlink:to="us-gaap_OffsettingLiabilitiesTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OffsettingLiabilitiesTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Offsetting Liabilities [Table]</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_USGovernmentAgencySecuritiesAndUSGovernmentSecuritiesAndCorporateFixedIncomeSecuritiesMember" xlink:type="locator" xlink:label="sf_USGovernmentAgencySecuritiesAndUSGovernmentSecuritiesAndCorporateFixedIncomeSecuritiesMember" />
    <link:label xml:lang="en-US" xlink:label="sf_USGovernmentAgencySecuritiesAndUSGovernmentSecuritiesAndCorporateFixedIncomeSecuritiesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">U.S. government agency securities and U.S. government securities and Corporate fixed income securities.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_USGovernmentAgencySecuritiesAndUSGovernmentSecuritiesAndCorporateFixedIncomeSecuritiesMember" xlink:to="sf_USGovernmentAgencySecuritiesAndUSGovernmentSecuritiesAndCorporateFixedIncomeSecuritiesMember_lbl" />
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    <link:label xml:lang="en-US" xlink:label="sf_USGovernmentAgencySecuritiesAndUSGovernmentSecuritiesAndCorporateFixedIncomeSecuritiesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">U S Government Agency Securities And U S Government Securities And Corporate Fixed Income Securities [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OffsettingLiabilitiesLineItems" xlink:type="locator" xlink:label="us-gaap_OffsettingLiabilitiesLineItems" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OffsettingLiabilitiesLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Offsetting Liabilities [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OffsettingLiabilitiesLineItems" xlink:to="us-gaap_OffsettingLiabilitiesLineItems_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OffsettingLiabilitiesLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Offsetting Liabilities [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_SecuritiesSoldUnderAgreementsToRepurchaseFairValueOfCollateral_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Fair value of securities pledged as collateral to counter party</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LossContingenciesTable" xlink:type="locator" xlink:label="us-gaap_LossContingenciesTable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LossContingenciesTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loss Contingencies [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LossContingenciesTable" xlink:to="us-gaap_LossContingenciesTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LossContingenciesTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Loss Contingencies [Table]</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_PurchaseCommitmentsMember" xlink:type="locator" xlink:label="sf_PurchaseCommitmentsMember" />
    <link:label xml:lang="en-US" xlink:label="sf_PurchaseCommitmentsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Purchase commitments.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_PurchaseCommitmentsMember" xlink:to="sf_PurchaseCommitmentsMember_lbl" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InformationByCategoryOfDebtSecurityAxis" xlink:type="locator" xlink:label="us-gaap_InformationByCategoryOfDebtSecurityAxis" />
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    <link:loc xlink:href="sf-20200930.xsd#sf_ToBeAnnouncedSecurityContractsMember" xlink:type="locator" xlink:label="sf_ToBeAnnouncedSecurityContractsMember" />
    <link:label xml:lang="en-US" xlink:label="sf_ToBeAnnouncedSecurityContractsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">To be announced (&#8220;TBA&#8221;) security contracts.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_ToBeAnnouncedSecurityContractsMember" xlink:to="sf_ToBeAnnouncedSecurityContractsMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="sf_ToBeAnnouncedSecurityContractsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">To Be Announced Security Contracts</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LossContingenciesLineItems" xlink:type="locator" xlink:label="us-gaap_LossContingenciesLineItems" />
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LossContingenciesLineItems" xlink:to="us-gaap_LossContingenciesLineItems_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LossContingenciesLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Loss Contingencies [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_MortgageBackedSecuritiesAvailableForSaleFairValueDisclosure" xlink:type="locator" xlink:label="us-gaap_MortgageBackedSecuritiesAvailableForSaleFairValueDisclosure" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_MortgageBackedSecuritiesAvailableForSaleFairValueDisclosure_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair value of the TBA securities</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_MortgageBackedSecuritiesAvailableForSaleFairValueDisclosure_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Mortgage Backed Securities Available For Sale Fair Value Disclosure</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_CommitmentsFairValueDisclosure_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Estimated fair value of the purchase commitments</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_CommitmentsFairValueDisclosure_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Commitments Fair Value Disclosure</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_PercentageOfAggregateDebitBalances" xlink:type="locator" xlink:label="sf_PercentageOfAggregateDebitBalances" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfComplianceWithRegulatoryCapitalRequirementsUnderBankingRegulationsTable" xlink:type="locator" xlink:label="us-gaap_ScheduleOfComplianceWithRegulatoryCapitalRequirementsUnderBankingRegulationsTable" />
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    <link:loc xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ParentCompanyMember" xlink:type="locator" xlink:label="srt_ParentCompanyMember" />
    <link:label xml:lang="en-US" xlink:label="srt_ParentCompanyMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stifel Financial Corp. [Member]</link:label>
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    <link:loc xlink:href="sf-20200930.xsd#sf_OurOtherBrokerDealerSubsidiariesMember" xlink:type="locator" xlink:label="sf_OurOtherBrokerDealerSubsidiariesMember" />
    <link:label xml:lang="en-US" xlink:label="sf_OurOtherBrokerDealerSubsidiariesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Our other broker-dealer subsidiaries.</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_AlternativeNetCapitalRequirement1" xlink:type="locator" xlink:label="srt_AlternativeNetCapitalRequirement1" />
    <link:label xml:lang="en-US" xlink:label="srt_AlternativeNetCapitalRequirement1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net capital under the alternative method</link:label>
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    <link:label xml:lang="en-US" xlink:label="srt_AlternativeNetCapitalRequirement1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Alternative Net Capital Requirement1</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_PercentageOfAggregateDebitBalances_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Aggregate debit balances</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RatioOfIndebtednessToNetCapital1" xlink:type="locator" xlink:label="us-gaap_RatioOfIndebtednessToNetCapital1" />
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    <link:label xml:lang="en-US" xlink:label="us-gaap_RatioOfIndebtednessToNetCapital1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Ratio Of Indebtedness To Net Capital1</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_NetCapital" xlink:type="locator" xlink:label="srt_NetCapital" />
    <link:label xml:lang="en-US" xlink:label="srt_NetCapital_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net capital</link:label>
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    <link:label xml:lang="en-US" xlink:label="srt_NetCapital_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Net Capital</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_AlternativeExcessNetCapital" xlink:type="locator" xlink:label="srt_AlternativeExcessNetCapital" />
    <link:label xml:lang="en-US" xlink:label="srt_AlternativeExcessNetCapital_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Excess of minimum required net capital</link:label>
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    <link:label xml:lang="en-US" xlink:label="srt_AlternativeExcessNetCapital_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Alternative Excess Net Capital</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_StifelBankAndTrustMember" xlink:type="locator" xlink:label="sf_StifelBankAndTrustMember" />
    <link:label xml:lang="en-US" xlink:label="sf_StifelBankAndTrustMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Stifel Bank and Trust.</link:label>
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    <link:loc xlink:href="sf-20200930.xsd#sf_StifelBankMember" xlink:type="locator" xlink:label="sf_StifelBankMember" />
    <link:label xml:lang="en-US" xlink:label="sf_StifelBankMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Stifel bank.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_StifelBankMember" xlink:to="sf_StifelBankMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="sf_StifelBankMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stifel Bank [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_StifelBankMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Stifel Bank [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TierOneRiskBasedCapital" xlink:type="locator" xlink:label="us-gaap_TierOneRiskBasedCapital" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneRiskBasedCapital_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Tier 1 capital, Actual Amount</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TierOneRiskBasedCapital" xlink:to="us-gaap_TierOneRiskBasedCapital_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneRiskBasedCapital_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Tier One Risk Based Capital</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets" xlink:type="locator" xlink:label="us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Tier 1 capital, Actual Ratio</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets" xlink:to="us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Tier One Risk Based Capital To Risk Weighted Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy" xlink:type="locator" xlink:label="us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Tier 1 capital For Capital Adequacy Purposes, Amount</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy" xlink:to="us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Tier One Risk Based Capital Required For Capital Adequacy</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets" xlink:type="locator" xlink:label="us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Tier 1 capital For Capital Adequacy Purposes, Ratio</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets" xlink:to="us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Tier One Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalized" xlink:type="locator" xlink:label="us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalized" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalized_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Tier 1 capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalized" xlink:to="us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalized_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalized_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Tier One Risk Based Capital Required To Be Well Capitalized</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets" xlink:type="locator" xlink:label="us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Tier 1 To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets" xlink:to="us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Tier One Risk Based Capital Required To Be Well Capitalized To Risk Weighted Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_Capital" xlink:type="locator" xlink:label="us-gaap_Capital" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_Capital_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total capital, Actual Amount</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_Capital" xlink:to="us-gaap_Capital_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_Capital_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Capital</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CapitalToRiskWeightedAssets" xlink:type="locator" xlink:label="us-gaap_CapitalToRiskWeightedAssets" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CapitalToRiskWeightedAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total capital, Actual Ratio</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CapitalToRiskWeightedAssets" xlink:to="us-gaap_CapitalToRiskWeightedAssets_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CapitalToRiskWeightedAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Capital To Risk Weighted Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CapitalRequiredForCapitalAdequacy" xlink:type="locator" xlink:label="us-gaap_CapitalRequiredForCapitalAdequacy" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CapitalRequiredForCapitalAdequacy_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total capital For Capital Adequacy Purposes, Amount</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CapitalRequiredForCapitalAdequacy" xlink:to="us-gaap_CapitalRequiredForCapitalAdequacy_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CapitalRequiredForCapitalAdequacy_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Capital Required For Capital Adequacy</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets" xlink:type="locator" xlink:label="us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total capital For Capital Adequacy Purposes, Ratio</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets" xlink:to="us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Capital Required For Capital Adequacy To Risk Weighted Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CapitalRequiredToBeWellCapitalized" xlink:type="locator" xlink:label="us-gaap_CapitalRequiredToBeWellCapitalized" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CapitalRequiredToBeWellCapitalized_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CapitalRequiredToBeWellCapitalized" xlink:to="us-gaap_CapitalRequiredToBeWellCapitalized_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CapitalRequiredToBeWellCapitalized_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Capital Required To Be Well Capitalized</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets" xlink:type="locator" xlink:label="us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets" xlink:to="us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Capital Required To Be Well Capitalized To Risk Weighted Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TierOneLeverageCapital" xlink:type="locator" xlink:label="us-gaap_TierOneLeverageCapital" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneLeverageCapital_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Tier 1 leverage, Actual Amount</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TierOneLeverageCapital" xlink:to="us-gaap_TierOneLeverageCapital_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneLeverageCapital_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Tier One Leverage Capital</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TierOneLeverageCapitalToAverageAssets" xlink:type="locator" xlink:label="us-gaap_TierOneLeverageCapitalToAverageAssets" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneLeverageCapitalToAverageAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Tier 1 leverage, Actual Ratio</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneLeverageCapitalToAverageAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Tier One Leverage Capital To Average Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy" xlink:type="locator" xlink:label="us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Tier 1 leverage For Capital Adequacy Purposes, Amount</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Tier One Leverage Capital Required For Capital Adequacy</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets" xlink:type="locator" xlink:label="us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Tier 1 leverage For Capital Adequacy Purposes, Ratio</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Tier One Leverage Capital Required For Capital Adequacy To Average Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalized" xlink:type="locator" xlink:label="us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalized" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalized_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Tier 1 leverage To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalized_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Tier One Leverage Capital Required To Be Well Capitalized</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets" xlink:type="locator" xlink:label="us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Tier 1 leverage To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets" xlink:to="us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Tier One Leverage Capital Required To Be Well Capitalized To Average Assets</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_RemainingLeaseTermOperatingLeases" xlink:type="locator" xlink:label="sf_RemainingLeaseTermOperatingLeases" />
    <link:label xml:lang="en-US" xlink:label="sf_RemainingLeaseTermOperatingLeases_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Remaining lease term operating leases.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_RemainingLeaseTermOperatingLeases" xlink:to="sf_RemainingLeaseTermOperatingLeases_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LesseeLeaseDescriptionTable" xlink:type="locator" xlink:label="us-gaap_LesseeLeaseDescriptionTable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeLeaseDescriptionTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lessee Lease Description [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LesseeLeaseDescriptionTable" xlink:to="us-gaap_LesseeLeaseDescriptionTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeLeaseDescriptionTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Lessee Lease Description [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RangeAxis" xlink:type="locator" xlink:label="srt_RangeAxis" />
    <link:label xml:lang="en-US" xlink:label="srt_RangeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Statistical Measurement</link:label>
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    <link:label xml:lang="en-US" xlink:label="srt_RangeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Range [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RangeMember" xlink:type="locator" xlink:label="srt_RangeMember" />
    <link:label xml:lang="en-US" xlink:label="srt_RangeMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Statistical Measurement</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_RangeMember" xlink:to="srt_RangeMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_RangeMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Range [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_MinimumMember" xlink:type="locator" xlink:label="srt_MinimumMember" />
    <link:label xml:lang="en-US" xlink:label="srt_MinimumMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Minimum [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_MinimumMember" xlink:to="srt_MinimumMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_MinimumMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Minimum [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_MaximumMember" xlink:type="locator" xlink:label="srt_MaximumMember" />
    <link:label xml:lang="en-US" xlink:label="srt_MaximumMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maximum [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_MaximumMember" xlink:to="srt_MaximumMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_MaximumMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Maximum [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis" xlink:type="locator" xlink:label="us-gaap_PropertyPlantAndEquipmentByTypeAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentByTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Long-Lived Tangible Asset</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentByTypeAxis" xlink:to="us-gaap_PropertyPlantAndEquipmentByTypeAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentByTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Property Plant And Equipment By Type [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:type="locator" xlink:label="us-gaap_PropertyPlantAndEquipmentTypeDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Long-Lived Tangible Asset</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:to="us-gaap_PropertyPlantAndEquipmentTypeDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Property Plant And Equipment Type [Domain]</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_OfficeSpaceAndOfficeEquipmentMember" xlink:type="locator" xlink:label="sf_OfficeSpaceAndOfficeEquipmentMember" />
    <link:label xml:lang="en-US" xlink:label="sf_OfficeSpaceAndOfficeEquipmentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Office space and office equipment.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_OfficeSpaceAndOfficeEquipmentMember" xlink:to="sf_OfficeSpaceAndOfficeEquipmentMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="sf_OfficeSpaceAndOfficeEquipmentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Office Space and Office Equipment [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_OfficeSpaceAndOfficeEquipmentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Office Space And Office Equipment [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LesseeLeaseDescriptionLineItems" xlink:type="locator" xlink:label="us-gaap_LesseeLeaseDescriptionLineItems" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeLeaseDescriptionLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lessee Lease Description [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LesseeLeaseDescriptionLineItems" xlink:to="us-gaap_LesseeLeaseDescriptionLineItems_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeLeaseDescriptionLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Lessee Lease Description [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_RemainingLeaseTermOperatingLeases_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating leases remaining lease term</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_RemainingLeaseTermOperatingLeases_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Remaining Lease Term Operating Leases</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingLeaseRightOfUseAsset" xlink:type="locator" xlink:label="us-gaap_OperatingLeaseRightOfUseAsset" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeaseRightOfUseAsset_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating lease right-of-use assets</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeaseRightOfUseAsset" xlink:to="us-gaap_OperatingLeaseRightOfUseAsset_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeaseRightOfUseAsset_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease Right Of Use Asset</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingLeaseLiability" xlink:type="locator" xlink:label="us-gaap_OperatingLeaseLiability" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeaseLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating lease liabilities</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeaseLiability" xlink:to="us-gaap_OperatingLeaseLiability_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeaseLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease Liability</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingLeaseCost" xlink:type="locator" xlink:label="us-gaap_OperatingLeaseCost" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeaseCost_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating lease cost</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeaseCost" xlink:to="us-gaap_OperatingLeaseCost_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeaseCost_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease Cost</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShortTermLeaseCost" xlink:type="locator" xlink:label="us-gaap_ShortTermLeaseCost" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShortTermLeaseCost_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Short-term lease cost</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShortTermLeaseCost" xlink:to="us-gaap_ShortTermLeaseCost_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShortTermLeaseCost_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Short Term Lease Cost</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_VariableLeaseCost" xlink:type="locator" xlink:label="us-gaap_VariableLeaseCost" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_VariableLeaseCost_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Variable lease cost</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_VariableLeaseCost" xlink:to="us-gaap_VariableLeaseCost_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_VariableLeaseCost_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Variable Lease Cost</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SubleaseIncome" xlink:type="locator" xlink:label="us-gaap_SubleaseIncome" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SubleaseIncome_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Sublease income</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubleaseIncome" xlink:to="us-gaap_SubleaseIncome_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SubleaseIncome_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Sublease Income</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LeaseCost" xlink:type="locator" xlink:label="us-gaap_LeaseCost" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LeaseCost_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net lease cost</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LeaseCost" xlink:to="us-gaap_LeaseCost_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LeaseCost_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Lease Cost</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingLeasePayments" xlink:type="locator" xlink:label="us-gaap_OperatingLeasePayments" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeasePayments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating lease cash flows</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasePayments" xlink:to="us-gaap_OperatingLeasePayments_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeasePayments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease Payments</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1" xlink:type="locator" xlink:label="us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted-average remaining lease term</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1" xlink:to="us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease Weighted Average Remaining Lease Term1</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent" xlink:type="locator" xlink:label="us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted-average discount rate</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent" xlink:to="us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease Weighted Average Discount Rate Percent</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear" xlink:type="locator" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Remainder of 2020</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear" xlink:to="us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Lessee Operating Lease Liability Payments Remainder Of Fiscal Year</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths" xlink:type="locator" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2021</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths" xlink:to="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Lessee Operating Lease Liability Payments Due Next Twelve Months</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo" xlink:type="locator" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2022</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo" xlink:to="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Lessee Operating Lease Liability Payments Due Year Two</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree" xlink:type="locator" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2023</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree" xlink:to="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Lessee Operating Lease Liability Payments Due Year Three</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour" xlink:type="locator" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2024</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour" xlink:to="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Lessee Operating Lease Liability Payments Due Year Four</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFour_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Thereafter</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFour_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Lessee Operating Lease Liability Payments Due After Year Four</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue" xlink:type="locator" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total undiscounted lease payments</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue" xlink:to="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Lessee Operating Lease Liability Payments Due</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount" xlink:type="locator" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Imputed interest</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount" xlink:to="us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Lessee Operating Lease Liability Undiscounted Excess Amount</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeaseLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Total operating lease liabilities</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_OtherRevenueFromContractsWithCustomer" xlink:type="locator" xlink:label="sf_OtherRevenueFromContractsWithCustomer" />
    <link:label xml:lang="en-US" xlink:label="sf_OtherRevenueFromContractsWithCustomer_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Other revenue from contracts with customer.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_OtherRevenueFromContractsWithCustomer" xlink:to="sf_OtherRevenueFromContractsWithCustomer_lbl" />
    <link:loc xlink:href="sf-20200930.xsd#sf_OtherSourcesOfRevenueAbstract" xlink:type="locator" xlink:label="sf_OtherSourcesOfRevenueAbstract" />
    <link:label xml:lang="en-US" xlink:label="sf_OtherSourcesOfRevenueAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Other sources of revenue.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_OtherSourcesOfRevenueAbstract" xlink:to="sf_OtherSourcesOfRevenueAbstract_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DisaggregationOfRevenueTable" xlink:type="locator" xlink:label="us-gaap_DisaggregationOfRevenueTable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DisaggregationOfRevenueTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Disaggregation Of Revenue [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DisaggregationOfRevenueTable" xlink:to="us-gaap_DisaggregationOfRevenueTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DisaggregationOfRevenueTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Disaggregation Of Revenue [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DisaggregationOfRevenueLineItems" xlink:type="locator" xlink:label="us-gaap_DisaggregationOfRevenueLineItems" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DisaggregationOfRevenueLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Disaggregation Of Revenue [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DisaggregationOfRevenueLineItems" xlink:to="us-gaap_DisaggregationOfRevenueLineItems_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DisaggregationOfRevenueLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Disaggregation Of Revenue [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_OtherRevenueFromContractsWithCustomer_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_OtherRevenueFromContractsWithCustomer_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Other Revenue From Contracts With Customer</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_RevenueFromContractWithCustomerExcludingOtherSegmentRevenueAndAssessedTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total revenue from contracts with customers</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_RevenueFromContractWithCustomerExcludingOtherSegmentRevenueAndAssessedTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Revenue From Contract With Customer Excluding Other Segment Revenue And Assessed Tax</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_OtherSourcesOfRevenueAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other sources of revenue:</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_OtherSourcesOfRevenueAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Other Sources Of Revenue [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_OtherRevenues_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_OtherRevenues_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Other Revenues</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_StatementGeographicalAxis" xlink:type="locator" xlink:label="srt_StatementGeographicalAxis" />
    <link:label xml:lang="en-US" xlink:label="srt_StatementGeographicalAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Geographical</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_StatementGeographicalAxis" xlink:to="srt_StatementGeographicalAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_StatementGeographicalAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Statement Geographical [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_SegmentGeographicalDomain" xlink:type="locator" xlink:label="srt_SegmentGeographicalDomain" />
    <link:label xml:lang="en-US" xlink:label="srt_SegmentGeographicalDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Geographical</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_SegmentGeographicalDomain" xlink:to="srt_SegmentGeographicalDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_SegmentGeographicalDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Segment Geographical [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_AmericasMember" xlink:type="locator" xlink:label="srt_AmericasMember" />
    <link:label xml:lang="en-US" xlink:label="srt_AmericasMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">United States [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_AmericasMember" xlink:to="srt_AmericasMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_AmericasMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Americas [Member]</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_GB" xlink:type="locator" xlink:label="country_GB" />
    <link:label xml:lang="en-US" xlink:label="country_GB_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">United Kingdom [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="country_GB" xlink:to="country_GB_lbl" />
    <link:label xml:lang="en-US" xlink:label="country_GB_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">UNITED KINGDOM</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_OtherStatesMember" xlink:type="locator" xlink:label="sf_OtherStatesMember" />
    <link:label xml:lang="en-US" xlink:label="sf_OtherStatesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Other states.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_OtherStatesMember" xlink:to="sf_OtherStatesMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="sf_OtherStatesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_OtherStatesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Other States [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AllOtherSegmentsMember" xlink:type="locator" xlink:label="us-gaap_AllOtherSegmentsMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AllOtherSegmentsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AllOtherSegmentsMember" xlink:to="us-gaap_AllOtherSegmentsMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AllOtherSegmentsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">All Other Segments [Member]</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_CapitalRaisingMember" xlink:type="locator" xlink:label="sf_CapitalRaisingMember" />
    <link:label xml:lang="en-US" xlink:label="sf_CapitalRaisingMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Capital raising.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_CapitalRaisingMember" xlink:to="sf_CapitalRaisingMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="sf_CapitalRaisingMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Capital Raising [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_CapitalRaisingMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Capital Raising [Member]</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_AdvisoryFeesMember" xlink:type="locator" xlink:label="sf_AdvisoryFeesMember" />
    <link:label xml:lang="en-US" xlink:label="sf_AdvisoryFeesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Advisory fees.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_AdvisoryFeesMember" xlink:to="sf_AdvisoryFeesMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="sf_AdvisoryFeesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Advisory Fees [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_AdvisoryFeesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Advisory Fees [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_InvestmentAdvisoryManagementAndAdministrativeServiceMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Asset Management [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BrokerageCommissionsRevenue" xlink:type="locator" xlink:label="us-gaap_BrokerageCommissionsRevenue" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BrokerageCommissionsRevenue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Commissions</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BrokerageCommissionsRevenue" xlink:to="us-gaap_BrokerageCommissionsRevenue_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BrokerageCommissionsRevenue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Brokerage Commissions Revenue</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InvestmentBankingRevenue" xlink:type="locator" xlink:label="us-gaap_InvestmentBankingRevenue" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InvestmentBankingRevenue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investment banking</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentBankingRevenue" xlink:to="us-gaap_InvestmentBankingRevenue_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InvestmentBankingRevenue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Investment Banking Revenue</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_ImpairmentRelatedToReceivables" xlink:type="locator" xlink:label="sf_ImpairmentRelatedToReceivables" />
    <link:label xml:lang="en-US" xlink:label="sf_ImpairmentRelatedToReceivables_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Impairment related to receivables.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_ImpairmentRelatedToReceivables" xlink:to="sf_ImpairmentRelatedToReceivables_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccountsReceivableNet" xlink:type="locator" xlink:label="us-gaap_AccountsReceivableNet" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccountsReceivableNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Receivables related to contract with customers</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccountsReceivableNet" xlink:to="us-gaap_AccountsReceivableNet_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccountsReceivableNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Accounts Receivable Net</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_ImpairmentRelatedToReceivables_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Impairment related to receivables</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_ImpairmentRelatedToReceivables_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Impairment Related To Receivables</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DeferredRevenue" xlink:type="locator" xlink:label="us-gaap_DeferredRevenue" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DeferredRevenue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred Revenue</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredRevenue" xlink:to="us-gaap_DeferredRevenue_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DeferredRevenue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Revenue</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_MarginBalances" xlink:type="locator" xlink:label="sf_MarginBalances" />
    <link:label xml:lang="en-US" xlink:label="sf_MarginBalances_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Margin balances.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_MarginBalances" xlink:to="sf_MarginBalances_lbl" />
    <link:loc xlink:href="sf-20200930.xsd#sf_InterestIncomeFromFinancialInstrumentsOwned" xlink:type="locator" xlink:label="sf_InterestIncomeFromFinancialInstrumentsOwned" />
    <link:label xml:lang="en-US" xlink:label="sf_InterestIncomeFromFinancialInstrumentsOwned_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Interest income from financial instruments owned.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_InterestIncomeFromFinancialInstrumentsOwned" xlink:to="sf_InterestIncomeFromFinancialInstrumentsOwned_lbl" />
    <link:loc xlink:href="sf-20200930.xsd#sf_OtherInterestAndDividendIncomeExpenseNet" xlink:type="locator" xlink:label="sf_OtherInterestAndDividendIncomeExpenseNet" />
    <link:label xml:lang="en-US" xlink:label="sf_OtherInterestAndDividendIncomeExpenseNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Other interest and dividend income expense net.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_OtherInterestAndDividendIncomeExpenseNet" xlink:to="sf_OtherInterestAndDividendIncomeExpenseNet_lbl" />
    <link:loc xlink:href="sf-20200930.xsd#sf_InterestIncomeExpenseOther" xlink:type="locator" xlink:label="sf_InterestIncomeExpenseOther" />
    <link:label xml:lang="en-US" xlink:label="sf_InterestIncomeExpenseOther_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Interest (income) expense other.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_InterestIncomeExpenseOther" xlink:to="sf_InterestIncomeExpenseOther_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InterestIncomeExpenseNetAbstract" xlink:type="locator" xlink:label="us-gaap_InterestIncomeExpenseNetAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestIncomeExpenseNetAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Interest Income Expense Net [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestIncomeExpenseNetAbstract" xlink:to="us-gaap_InterestIncomeExpenseNetAbstract_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InterestAndFeeIncomeLoansAndLeasesHeldInPortfolio" xlink:type="locator" xlink:label="us-gaap_InterestAndFeeIncomeLoansAndLeasesHeldInPortfolio" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestAndFeeIncomeLoansAndLeasesHeldInPortfolio_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loans held for investment, net</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestAndFeeIncomeLoansAndLeasesHeldInPortfolio" xlink:to="us-gaap_InterestAndFeeIncomeLoansAndLeasesHeldInPortfolio_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestAndFeeIncomeLoansAndLeasesHeldInPortfolio_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Interest And Fee Income Loans And Leases Held In Portfolio</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InterestAndDividendIncomeSecuritiesAvailableForSale" xlink:type="locator" xlink:label="us-gaap_InterestAndDividendIncomeSecuritiesAvailableForSale" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestAndDividendIncomeSecuritiesAvailableForSale_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investment securities</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestAndDividendIncomeSecuritiesAvailableForSale" xlink:to="us-gaap_InterestAndDividendIncomeSecuritiesAvailableForSale_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestAndDividendIncomeSecuritiesAvailableForSale_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Interest And Dividend Income Securities Available For Sale</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_MarginBalances_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Margin balances</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_MarginBalances_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Margin Balances</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_InterestIncomeFromFinancialInstrumentsOwned_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Financial instruments owned</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_InterestIncomeFromFinancialInstrumentsOwned_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Interest Income From Financial Instruments Owned</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_OtherInterestAndDividendIncomeExpenseNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_OtherInterestAndDividendIncomeExpenseNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Other Interest And Dividend Income Expense Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InterestIncomeOperating" xlink:type="locator" xlink:label="us-gaap_InterestIncomeOperating" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestIncomeOperating_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total interest income</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestIncomeOperating" xlink:to="us-gaap_InterestIncomeOperating_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestIncomeOperating_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Interest Income Operating</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InterestExpenseDomesticDeposits" xlink:type="locator" xlink:label="us-gaap_InterestExpenseDomesticDeposits" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestExpenseDomesticDeposits_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Bank deposits</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestExpenseDomesticDeposits" xlink:to="us-gaap_InterestExpenseDomesticDeposits_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestExpenseDomesticDeposits_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Interest Expense Domestic Deposits</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InterestExpenseDebt" xlink:type="locator" xlink:label="us-gaap_InterestExpenseDebt" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestExpenseDebt_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Senior notes</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestExpenseDebt" xlink:to="us-gaap_InterestExpenseDebt_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestExpenseDebt_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Interest Expense Debt</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InterestExpenseFederalHomeLoanBankAndFederalReserveBankAdvancesShortTerm" xlink:type="locator" xlink:label="us-gaap_InterestExpenseFederalHomeLoanBankAndFederalReserveBankAdvancesShortTerm" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestExpenseFederalHomeLoanBankAndFederalReserveBankAdvancesShortTerm_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Federal Home Loan Bank advances</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestExpenseFederalHomeLoanBankAndFederalReserveBankAdvancesShortTerm" xlink:to="us-gaap_InterestExpenseFederalHomeLoanBankAndFederalReserveBankAdvancesShortTerm_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestExpenseFederalHomeLoanBankAndFederalReserveBankAdvancesShortTerm_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Interest Expense Federal Home Loan Bank And Federal Reserve Bank Advances Short Term</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_InterestIncomeExpenseOther_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_InterestIncomeExpenseOther_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Interest Income Expense Other</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total interest expense</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:type="locator" xlink:label="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:to="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AwardTypeAxis" xlink:type="locator" xlink:label="us-gaap_AwardTypeAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AwardTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Award Type</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AwardTypeAxis" xlink:to="us-gaap_AwardTypeAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AwardTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Award Type [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Award Type</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:to="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangements By Share Based Payment Award Award Type And Plan Name [Domain]</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_DeferredAwardsMember" xlink:type="locator" xlink:label="sf_DeferredAwardsMember" />
    <link:label xml:lang="en-US" xlink:label="sf_DeferredAwardsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Deferred awards.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_DeferredAwardsMember" xlink:to="sf_DeferredAwardsMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="sf_DeferredAwardsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred Awards [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_DeferredAwardsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Awards [Member]</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_IncentiveStockPlanMember" xlink:type="locator" xlink:label="sf_IncentiveStockPlanMember" />
    <link:label xml:lang="en-US" xlink:label="sf_IncentiveStockPlanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Incentive stock plan.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_IncentiveStockPlanMember" xlink:to="sf_IncentiveStockPlanMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="sf_IncentiveStockPlanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Incentive Stock Plan [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_IncentiveStockPlanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Incentive Stock Plan [Member]</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_RestrictedStockAwardMember" xlink:type="locator" xlink:label="sf_RestrictedStockAwardMember" />
    <link:label xml:lang="en-US" xlink:label="sf_RestrictedStockAwardMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Restricted stock award.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_RestrictedStockAwardMember" xlink:to="sf_RestrictedStockAwardMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="sf_RestrictedStockAwardMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restricted Stock Award [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_RestrictedStockAwardMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Restricted Stock Award [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RestrictedStockUnitsRSUMember" xlink:type="locator" xlink:label="us-gaap_RestrictedStockUnitsRSUMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RestrictedStockUnitsRSUMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restricted Stock Units (RSUs) [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RestrictedStockUnitsRSUMember" xlink:to="us-gaap_RestrictedStockUnitsRSUMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RestrictedStockUnitsRSUMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Restricted Stock Units R S U [Member]</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_RestrictedStockUnitsPerformanceBasedRestrictedStockUnitsAndRestrictedStockAwardsMember" xlink:type="locator" xlink:label="sf_RestrictedStockUnitsPerformanceBasedRestrictedStockUnitsAndRestrictedStockAwardsMember" />
    <link:label xml:lang="en-US" xlink:label="sf_RestrictedStockUnitsPerformanceBasedRestrictedStockUnitsAndRestrictedStockAwardsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Restricted stock units, performance based restricted stock units and restricted stock awards.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_RestrictedStockUnitsPerformanceBasedRestrictedStockUnitsAndRestrictedStockAwardsMember" xlink:to="sf_RestrictedStockUnitsPerformanceBasedRestrictedStockUnitsAndRestrictedStockAwardsMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="sf_RestrictedStockUnitsPerformanceBasedRestrictedStockUnitsAndRestrictedStockAwardsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restricted Stock Units, PRSUs, and Restricted Stock Awards [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_RestrictedStockUnitsPerformanceBasedRestrictedStockUnitsAndRestrictedStockAwardsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Restricted Stock Units Performance Based Restricted Stock Units And Restricted Stock Awards [Member]</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_PerformanceBasedRestrictedStockUnitsMember" xlink:type="locator" xlink:label="sf_PerformanceBasedRestrictedStockUnitsMember" />
    <link:label xml:lang="en-US" xlink:label="sf_PerformanceBasedRestrictedStockUnitsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Performance-based restricted stock units.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_PerformanceBasedRestrictedStockUnitsMember" xlink:to="sf_PerformanceBasedRestrictedStockUnitsMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="sf_PerformanceBasedRestrictedStockUnitsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Performance-based Restricted Stock Units [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_PerformanceBasedRestrictedStockUnitsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Performance Based Restricted Stock Units [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_VestingAxis" xlink:type="locator" xlink:label="us-gaap_VestingAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_VestingAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Vesting</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_VestingAxis" xlink:to="us-gaap_VestingAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_VestingAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Vesting [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_VestingDomain" xlink:type="locator" xlink:label="us-gaap_VestingDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_VestingDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Vesting</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_VestingDomain" xlink:to="us-gaap_VestingDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_VestingDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Vesting [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationAwardTrancheOneMember" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationAwardTrancheOneMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationAwardTrancheOneMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">One to Four Years [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationAwardTrancheOneMember" xlink:to="us-gaap_ShareBasedCompensationAwardTrancheOneMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationAwardTrancheOneMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Award Tranche One [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationAwardTrancheTwoMember" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationAwardTrancheTwoMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationAwardTrancheTwoMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fifth Year [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationAwardTrancheTwoMember" xlink:to="us-gaap_ShareBasedCompensationAwardTrancheTwoMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationAwardTrancheTwoMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Award Tranche Two [Member]</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_RestrictedStockUnitsAndRestrictedStockAwardsMember" xlink:type="locator" xlink:label="sf_RestrictedStockUnitsAndRestrictedStockAwardsMember" />
    <link:label xml:lang="en-US" xlink:label="sf_RestrictedStockUnitsAndRestrictedStockAwardsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Restricted stock units and restricted stock awards.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_RestrictedStockUnitsAndRestrictedStockAwardsMember" xlink:to="sf_RestrictedStockUnitsAndRestrictedStockAwardsMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="sf_RestrictedStockUnitsAndRestrictedStockAwardsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restricted Stock Units and Restricted Stock Awards [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_RestrictedStockUnitsAndRestrictedStockAwardsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Restricted Stock Units And Restricted Stock Awards [Member]</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_StifelNicolausWealthAccumulationPlanMember" xlink:type="locator" xlink:label="sf_StifelNicolausWealthAccumulationPlanMember" />
    <link:label xml:lang="en-US" xlink:label="sf_StifelNicolausWealthAccumulationPlanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Stifel Nicolaus wealth accumulation plan.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_StifelNicolausWealthAccumulationPlanMember" xlink:to="sf_StifelNicolausWealthAccumulationPlanMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="sf_StifelNicolausWealthAccumulationPlanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">SWAP Plan [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_StifelNicolausWealthAccumulationPlanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Stifel Nicolaus Wealth Accumulation Plan [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DeferredCompensationArrangementWithIndividualShareBasedPaymentsByTypeOfDeferredCompensationAxis" xlink:type="locator" xlink:label="us-gaap_DeferredCompensationArrangementWithIndividualShareBasedPaymentsByTypeOfDeferredCompensationAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DeferredCompensationArrangementWithIndividualShareBasedPaymentsByTypeOfDeferredCompensationAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Equity-Based Arrangements, Individual Contracts, Type of Deferred Compensation</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredCompensationArrangementWithIndividualShareBasedPaymentsByTypeOfDeferredCompensationAxis" xlink:to="us-gaap_DeferredCompensationArrangementWithIndividualShareBasedPaymentsByTypeOfDeferredCompensationAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DeferredCompensationArrangementWithIndividualShareBasedPaymentsByTypeOfDeferredCompensationAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Compensation Arrangement With Individual Share Based Payments By Type Of Deferred Compensation [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EquityBasedArrangementsIndividualContractsTypeOfDeferredCompensationDomain" xlink:type="locator" xlink:label="us-gaap_EquityBasedArrangementsIndividualContractsTypeOfDeferredCompensationDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_EquityBasedArrangementsIndividualContractsTypeOfDeferredCompensationDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Equity-Based Arrangements, Individual Contracts, Type of Deferred Compensation</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EquityBasedArrangementsIndividualContractsTypeOfDeferredCompensationDomain" xlink:to="us-gaap_EquityBasedArrangementsIndividualContractsTypeOfDeferredCompensationDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_EquityBasedArrangementsIndividualContractsTypeOfDeferredCompensationDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Equity Based Arrangements Individual Contracts Type Of Deferred Compensation [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DeferredCompensationShareBasedPaymentsMember" xlink:type="locator" xlink:label="us-gaap_DeferredCompensationShareBasedPaymentsMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DeferredCompensationShareBasedPaymentsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred Compensation Plans [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredCompensationShareBasedPaymentsMember" xlink:to="us-gaap_DeferredCompensationShareBasedPaymentsMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DeferredCompensationShareBasedPaymentsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Compensation Share Based Payments [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share-based Compensation Arrangement by Share-based Payment Award [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Awards vesting period in years</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Period1</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Shares authorized to grant</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award Number Of Additional Shares Authorized</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_SharebasedCompensationArrangementByShareBasedPaymentAwardAwardSharesPotentiallyConvertedRangePercentage" xlink:type="locator" xlink:label="sf_SharebasedCompensationArrangementByShareBasedPaymentAwardAwardSharesPotentiallyConvertedRangePercentage" />
    <link:label xml:lang="en-US" xlink:label="sf_SharebasedCompensationArrangementByShareBasedPaymentAwardAwardSharesPotentiallyConvertedRangePercentage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Sharebased compensation arrangement by share based payment award award shares potentially converted range percentage.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_SharebasedCompensationArrangementByShareBasedPaymentAwardAwardSharesPotentiallyConvertedRangePercentage" xlink:to="sf_SharebasedCompensationArrangementByShareBasedPaymentAwardAwardSharesPotentiallyConvertedRangePercentage_lbl" />
    <link:loc xlink:href="sf-20200930.xsd#sf_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardPerformancePeriod" xlink:type="locator" xlink:label="sf_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardPerformancePeriod" />
    <link:label xml:lang="en-US" xlink:label="sf_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardPerformancePeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Share based compensation arrangement by share based payment award award performance period.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardPerformancePeriod" xlink:to="sf_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardPerformancePeriod_lbl" />
    <link:label xml:lang="en-US" xlink:label="sf_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardPerformancePeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Award performance period in years</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardPerformancePeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award Award Performance Period</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total number of stock awards outstanding</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award Non Option Equity Instruments Outstanding Number</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unvested stock awards outstanding</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage" xlink:type="locator" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of earned award vested</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage" xlink:to="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Sharebased Compensation Arrangement By Sharebased Payment Award Award Vesting Rights Percentage</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_SharebasedCompensationArrangementByShareBasedPaymentAwardAwardSharesPotentiallyConvertedRangePercentage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Potential percentage of converted shares</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_SharebasedCompensationArrangementByShareBasedPaymentAwardAwardSharesPotentiallyConvertedRangePercentage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Sharebased Compensation Arrangement By Share Based Payment Award Award Shares Potentially Converted Range Percentage</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized" xlink:type="locator" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unrecognized compensation expense related to non-vested options</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized" xlink:to="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1" xlink:type="locator" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted-average period, compensation cost expected to recognized, in years</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1" xlink:to="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_ElectiveDeferralsVestedPercentage" xlink:type="locator" xlink:label="sf_ElectiveDeferralsVestedPercentage" />
    <link:label xml:lang="en-US" xlink:label="sf_ElectiveDeferralsVestedPercentage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Elective deferrals vested percentage.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_ElectiveDeferralsVestedPercentage" xlink:to="sf_ElectiveDeferralsVestedPercentage_lbl" />
    <link:label xml:lang="en-US" xlink:label="sf_ElectiveDeferralsVestedPercentage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Elective deferrals vested percentage</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_ElectiveDeferralsVestedPercentage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Elective Deferrals Vested Percentage</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_PercentageOfEarningsDeferredIntoCompanyStockUnitsAdditionalElectiveDeferral" xlink:type="locator" xlink:label="sf_PercentageOfEarningsDeferredIntoCompanyStockUnitsAdditionalElectiveDeferral" />
    <link:label xml:lang="en-US" xlink:label="sf_PercentageOfEarningsDeferredIntoCompanyStockUnitsAdditionalElectiveDeferral_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of earnings deferred into company stock units additional elective deferral.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_PercentageOfEarningsDeferredIntoCompanyStockUnitsAdditionalElectiveDeferral" xlink:to="sf_PercentageOfEarningsDeferredIntoCompanyStockUnitsAdditionalElectiveDeferral_lbl" />
    <link:loc xlink:href="sf-20200930.xsd#sf_PercentageOfEarningsDeferredIntoCompanyStockUnits" xlink:type="locator" xlink:label="sf_PercentageOfEarningsDeferredIntoCompanyStockUnits" />
    <link:label xml:lang="en-US" xlink:label="sf_PercentageOfEarningsDeferredIntoCompanyStockUnits_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of earnings deferred into company stock units.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_PercentageOfEarningsDeferredIntoCompanyStockUnits" xlink:to="sf_PercentageOfEarningsDeferredIntoCompanyStockUnits_lbl" />
    <link:label xml:lang="en-US" xlink:label="sf_PercentageOfEarningsDeferredIntoCompanyStockUnits_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of earnings deferred into company stock units</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_PercentageOfEarningsDeferredIntoCompanyStockUnits_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Percentage Of Earnings Deferred Into Company Stock Units</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_PercentageOfEarningsDeferredIntoCompanyStockUnitsAdditionalElectiveDeferral_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of earnings deferred into company stock units, Additional elective deferral</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_PercentageOfEarningsDeferredIntoCompanyStockUnitsAdditionalElectiveDeferral_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Percentage Of Earnings Deferred Into Company Stock Units Additional Elective Deferral</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount" xlink:type="locator" xlink:label="us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Contributions to 401(k) Plan</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount" xlink:to="us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Defined Contribution Plan Employer Discretionary Contribution Amount</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_GeneralSettlementPeriodOfSecuritiesTransactions" xlink:type="locator" xlink:label="sf_GeneralSettlementPeriodOfSecuritiesTransactions" />
    <link:label xml:lang="en-US" xlink:label="sf_GeneralSettlementPeriodOfSecuritiesTransactions_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">General settlement period of securities transactions.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_GeneralSettlementPeriodOfSecuritiesTransactions" xlink:to="sf_GeneralSettlementPeriodOfSecuritiesTransactions_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfFairValueOffBalanceSheetRisksTable" xlink:type="locator" xlink:label="us-gaap_ScheduleOfFairValueOffBalanceSheetRisksTable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfFairValueOffBalanceSheetRisksTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Fair Value Off Balance Sheet Risks [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfFairValueOffBalanceSheetRisksTable" xlink:to="us-gaap_ScheduleOfFairValueOffBalanceSheetRisksTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfFairValueOffBalanceSheetRisksTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Fair Value Off Balance Sheet Risks [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StandbyLettersOfCreditMember" xlink:type="locator" xlink:label="us-gaap_StandbyLettersOfCreditMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StandbyLettersOfCreditMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Standby Letters of Credit [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StandbyLettersOfCreditMember" xlink:to="us-gaap_StandbyLettersOfCreditMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StandbyLettersOfCreditMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Standby Letters Of Credit [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_UnusedLinesOfCreditMember" xlink:type="locator" xlink:label="us-gaap_UnusedLinesOfCreditMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_UnusedLinesOfCreditMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unused Lines Of Credit [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_UnusedLinesOfCreditMember" xlink:to="us-gaap_UnusedLinesOfCreditMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_UnusedLinesOfCreditMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Unused Lines Of Credit [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccountsPayableAndAccruedLiabilitiesMember" xlink:type="locator" xlink:label="us-gaap_AccountsPayableAndAccruedLiabilitiesMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccountsPayableAndAccruedLiabilitiesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accounts Payable and Accrued Expenses [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccountsPayableAndAccruedLiabilitiesMember" xlink:to="us-gaap_AccountsPayableAndAccruedLiabilitiesMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccountsPayableAndAccruedLiabilitiesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Accounts Payable And Accrued Liabilities [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueOffBalanceSheetRisksDisclosureInformationLineItems" xlink:type="locator" xlink:label="us-gaap_FairValueOffBalanceSheetRisksDisclosureInformationLineItems" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueOffBalanceSheetRisksDisclosureInformationLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value Off Balance Sheet Risks Disclosure Information [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueOffBalanceSheetRisksDisclosureInformationLineItems" xlink:to="us-gaap_FairValueOffBalanceSheetRisksDisclosureInformationLineItems_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueOffBalanceSheetRisksDisclosureInformationLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Off Balance Sheet Risks Disclosure Information [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_GeneralSettlementPeriodOfSecuritiesTransactions_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">General settlement period of securities transactions</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_GeneralSettlementPeriodOfSecuritiesTransactions_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">General Settlement Period Of Securities Transactions</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CustomerSecuritiesForWhichEntityHasRightToSellOrRepledgeFairValue" xlink:type="locator" xlink:label="us-gaap_CustomerSecuritiesForWhichEntityHasRightToSellOrRepledgeFairValue" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CustomerSecuritiesForWhichEntityHasRightToSellOrRepledgeFairValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair value of securities accepted as collateral permitted to sell or repledge</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CustomerSecuritiesForWhichEntityHasRightToSellOrRepledgeFairValue" xlink:to="us-gaap_CustomerSecuritiesForWhichEntityHasRightToSellOrRepledgeFairValue_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CustomerSecuritiesForWhichEntityHasRightToSellOrRepledgeFairValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Customer Securities For Which Entity Has Right To Sell Or Repledge Fair Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CustomerSecuritiesForWhichEntityHasRightToSellOrRepledgeFairValueOfSecuritiesSoldOrRepledged" xlink:type="locator" xlink:label="us-gaap_CustomerSecuritiesForWhichEntityHasRightToSellOrRepledgeFairValueOfSecuritiesSoldOrRepledged" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CustomerSecuritiesForWhichEntityHasRightToSellOrRepledgeFairValueOfSecuritiesSoldOrRepledged_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair value of collateral securities sold or repledged</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CustomerSecuritiesForWhichEntityHasRightToSellOrRepledgeFairValueOfSecuritiesSoldOrRepledged" xlink:to="us-gaap_CustomerSecuritiesForWhichEntityHasRightToSellOrRepledgeFairValueOfSecuritiesSoldOrRepledged_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CustomerSecuritiesForWhichEntityHasRightToSellOrRepledgeFairValueOfSecuritiesSoldOrRepledged_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Customer Securities For Which Entity Has Right To Sell Or Repledge Fair Value Of Securities Sold Or Repledged</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_OutstandingCommitmentsToOriginateLoans" xlink:type="locator" xlink:label="sf_OutstandingCommitmentsToOriginateLoans" />
    <link:label xml:lang="en-US" xlink:label="sf_OutstandingCommitmentsToOriginateLoans_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Outstanding commitments to originate loans.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_OutstandingCommitmentsToOriginateLoans" xlink:to="sf_OutstandingCommitmentsToOriginateLoans_lbl" />
    <link:label xml:lang="en-US" xlink:label="sf_OutstandingCommitmentsToOriginateLoans_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Outstanding commitments to originate loans</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_OutstandingCommitmentsToOriginateLoans_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Outstanding Commitments To Originate Loans</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LettersOfCreditOutstandingAmount" xlink:type="locator" xlink:label="us-gaap_LettersOfCreditOutstandingAmount" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LettersOfCreditOutstandingAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Letters of credit outstanding</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LettersOfCreditOutstandingAmount" xlink:to="us-gaap_LettersOfCreditOutstandingAmount_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LettersOfCreditOutstandingAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Letters Of Credit Outstanding Amount</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LineOfCreditFacilityExpirationPeriod" xlink:type="locator" xlink:label="us-gaap_LineOfCreditFacilityExpirationPeriod" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LineOfCreditFacilityExpirationPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Letters of credit, expiration period</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LineOfCreditFacilityExpirationPeriod" xlink:to="us-gaap_LineOfCreditFacilityExpirationPeriod_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LineOfCreditFacilityExpirationPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Line Of Credit Facility Expiration Period</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_UnusedLinesOfCreditToCommercialAndConsumerBorrowers" xlink:type="locator" xlink:label="sf_UnusedLinesOfCreditToCommercialAndConsumerBorrowers" />
    <link:label xml:lang="en-US" xlink:label="sf_UnusedLinesOfCreditToCommercialAndConsumerBorrowers_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Unused lines of credit to commercial and consumer borrowers.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_UnusedLinesOfCreditToCommercialAndConsumerBorrowers" xlink:to="sf_UnusedLinesOfCreditToCommercialAndConsumerBorrowers_lbl" />
    <link:label xml:lang="en-US" xlink:label="sf_UnusedLinesOfCreditToCommercialAndConsumerBorrowers_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unused lines of credit to commercial and consumer borrowers</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_UnusedLinesOfCreditToCommercialAndConsumerBorrowers_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Unused Lines Of Credit To Commercial And Consumer Borrowers</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_ExpectedCreditLossesForUnfundedCreditLoss" xlink:type="locator" xlink:label="sf_ExpectedCreditLossesForUnfundedCreditLoss" />
    <link:label xml:lang="en-US" xlink:label="sf_ExpectedCreditLossesForUnfundedCreditLoss_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Expected credit losses for unfunded credit loss.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_ExpectedCreditLossesForUnfundedCreditLoss" xlink:to="sf_ExpectedCreditLossesForUnfundedCreditLoss_lbl" />
    <link:loc xlink:href="sf-20200930.xsd#sf_ReserveForUnfundedCommitmentsForCreditLoss" xlink:type="locator" xlink:label="sf_ReserveForUnfundedCommitmentsForCreditLoss" />
    <link:label xml:lang="en-US" xlink:label="sf_ReserveForUnfundedCommitmentsForCreditLoss_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Reserve for unfunded commitments for credit loss.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_ReserveForUnfundedCommitmentsForCreditLoss" xlink:to="sf_ReserveForUnfundedCommitmentsForCreditLoss_lbl" />
    <link:label xml:lang="en-US" xlink:label="sf_ReserveForUnfundedCommitmentsForCreditLoss_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reserve for unfunded commitments</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_ReserveForUnfundedCommitmentsForCreditLoss_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Reserve For Unfunded Commitments For Credit Loss</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_ExpectedCreditLossesForUnfundedCreditLoss_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expected credit losses</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_ExpectedCreditLossesForUnfundedCreditLoss_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Expected Credit Losses For Unfunded Credit Loss</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable" xlink:type="locator" xlink:label="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Segment Reporting Information By Segment [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable" xlink:to="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Segment Reporting Information By Segment [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SegmentReportingInformationLineItems" xlink:type="locator" xlink:label="us-gaap_SegmentReportingInformationLineItems" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SegmentReportingInformationLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Segment Reporting Information [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SegmentReportingInformationLineItems" xlink:to="us-gaap_SegmentReportingInformationLineItems_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SegmentReportingInformationLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Segment Reporting Information [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NumberOfOperatingSegments" xlink:type="locator" xlink:label="us-gaap_NumberOfOperatingSegments" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NumberOfOperatingSegments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of business segments</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NumberOfOperatingSegments" xlink:to="us-gaap_NumberOfOperatingSegments_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NumberOfOperatingSegments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Operating Segments</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_NumberOfBusinessesWithinOperatingSegment" xlink:type="locator" xlink:label="sf_NumberOfBusinessesWithinOperatingSegment" />
    <link:label xml:lang="en-US" xlink:label="sf_NumberOfBusinessesWithinOperatingSegment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of businesses within operating segment.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_NumberOfBusinessesWithinOperatingSegment" xlink:to="sf_NumberOfBusinessesWithinOperatingSegment_lbl" />
    <link:label xml:lang="en-US" xlink:label="sf_NumberOfBusinessesWithinOperatingSegment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of businesses within operating segment</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_NumberOfBusinessesWithinOperatingSegment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Businesses Within Operating Segment</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_AllOtherSegmentsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Other Segments [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_RevenuesNetOfInterestExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Net revenues</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" xlink:type="locator" xlink:label="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Income/(loss) before income taxes</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" xlink:to="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_NetRevenuesAccountedForByIndividualClientMaximumPercentage" xlink:type="locator" xlink:label="sf_NetRevenuesAccountedForByIndividualClientMaximumPercentage" />
    <link:label xml:lang="en-US" xlink:label="sf_NetRevenuesAccountedForByIndividualClientMaximumPercentage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Net revenues accounted for by individual client, maximum percentage.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_NetRevenuesAccountedForByIndividualClientMaximumPercentage" xlink:to="sf_NetRevenuesAccountedForByIndividualClientMaximumPercentage_lbl" />
    <link:label xml:lang="en-US" xlink:label="sf_NetRevenuesAccountedForByIndividualClientMaximumPercentage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net revenues accounted for by individual client, maximum percentage</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_NetRevenuesAccountedForByIndividualClientMaximumPercentage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Net Revenues Accounted For By Individual Client Maximum Percentage</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_Assets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total assets</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_US" xlink:type="locator" xlink:label="country_US" />
    <link:label xml:lang="en-US" xlink:label="country_US_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">United States [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="country_US" xlink:to="country_US_lbl" />
    <link:label xml:lang="en-US" xlink:label="country_US_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">UNITED STATES</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_OtherCountriesMember" xlink:type="locator" xlink:label="sf_OtherCountriesMember" />
    <link:label xml:lang="en-US" xlink:label="sf_OtherCountriesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Other countries.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_OtherCountriesMember" xlink:to="sf_OtherCountriesMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="sf_OtherCountriesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_OtherCountriesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Other Countries [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_RevenuesNetOfInterestExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total net revenues</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_NetIncomeLoss_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Net income applicable to Stifel Financial Corp.</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Average shares used in basic computation</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" xlink:type="locator" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Dilutive effect of stock options and units</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" xlink:to="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Average shares used in diluted computation</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommonStockDividendsPerShareCashPaid" xlink:type="locator" xlink:label="us-gaap_CommonStockDividendsPerShareCashPaid" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockDividendsPerShareCashPaid_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash dividends paid per common share</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockDividendsPerShareCashPaid" xlink:to="us-gaap_CommonStockDividendsPerShareCashPaid_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockDividendsPerShareCashPaid_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock Dividends Per Share Cash Paid</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionEquityInterestIssuedOrIssuableTable" xlink:type="locator" xlink:label="us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionEquityInterestIssuedOrIssuableTable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionEquityInterestIssuedOrIssuableTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Business Acquisitions By Acquisition Equity Interest Issued Or Issuable [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionEquityInterestIssuedOrIssuableTable" xlink:to="us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionEquityInterestIssuedOrIssuableTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionEquityInterestIssuedOrIssuableTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Business Acquisitions By Acquisition Equity Interest Issued Or Issuable [Table]</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_BusinessBancsharesIncMember" xlink:type="locator" xlink:label="sf_BusinessBancsharesIncMember" />
    <link:label xml:lang="en-US" xlink:label="sf_BusinessBancsharesIncMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Business Bancshares, Inc.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_BusinessBancsharesIncMember" xlink:to="sf_BusinessBancsharesIncMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="sf_BusinessBancsharesIncMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Business Bancshares, Inc. [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="sf_BusinessBancsharesIncMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Business Bancshares Inc [Member]</link:label>
    <link:loc xlink:href="sf-20200930.xsd#sf_NoncumulativePerpetualSeriesCPreferredStockMember" xlink:type="locator" xlink:label="sf_NoncumulativePerpetualSeriesCPreferredStockMember" />
    <link:label xml:lang="en-US" xlink:label="sf_NoncumulativePerpetualSeriesCPreferredStockMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Noncumulative perpetual, series C preferred stock.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="sf_NoncumulativePerpetualSeriesCPreferredStockMember" xlink:to="sf_NoncumulativePerpetualSeriesCPreferredStockMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="sf_NoncumulativePerpetualSeriesCPreferredStockMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Non-Cumulative Perpetual Preferred Stock, Series C [Member]</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SeriesCPreferredStockMember" xlink:type="locator" xlink:label="us-gaap_SeriesCPreferredStockMember" />
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