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  <xs:element id="ago_VariableInterestEntityConsolidatedCarryingAmountLiabilitiesWithRecourse" abstract="false" name="VariableInterestEntityConsolidatedCarryingAmountLiabilitiesWithRecourse" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ago_VariableInterestEntityConsolidatedCarryingAmountLiabilitiesWithoutRecourse" abstract="false" name="VariableInterestEntityConsolidatedCarryingAmountLiabilitiesWithoutRecourse" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ago_FairValueGainLossOnCommittedCapitalSecurities" abstract="false" name="FairValueGainLossOnCommittedCapitalSecurities" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ago_VariableInterestEntityChangeinFairValue" abstract="false" name="VariableInterestEntityChangeinFairValue" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ago_FairValueGainLossOnConsolidatedInvestmentVehicles" abstract="false" name="FairValueGainLossOnConsolidatedInvestmentVehicles" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ago_OtherComprehensiveIncomeLossAvailableforsaleSecuritiesWithoutCreditImpairmentNetofTax" abstract="false" name="OtherComprehensiveIncomeLossAvailableforsaleSecuritiesWithoutCreditImpairmentNetofTax" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ago_OtherComprehensiveIncomeLossAvailableforsaleSecuritiesWithCreditImpairmentNetofTax" abstract="false" name="OtherComprehensiveIncomeLossAvailableforsaleSecuritiesWithCreditImpairmentNetofTax" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ago_OtherComprehensiveIncomeLossOtherNetofTaxPortionAttributableToParent" abstract="false" name="OtherComprehensiveIncomeLossOtherNetofTaxPortionAttributableToParent" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ago_OtherComprehensiveIncomeLossAvailableforsaleSecuritiesWithoutCreditImpairmentTax" abstract="false" name="OtherComprehensiveIncomeLossAvailableforsaleSecuritiesWithoutCreditImpairmentTax" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ago_OtherComprehensiveIncomeLossAvailableforsaleSecuritiesWithCreditImpairmentTax" abstract="false" name="OtherComprehensiveIncomeLossAvailableforsaleSecuritiesWithCreditImpairmentTax" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ago_StockIssuedDuringPeriodSharesShareBasedCompensationAndOther" abstract="false" name="StockIssuedDuringPeriodSharesShareBasedCompensationAndOther" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="ago_StockIssuedDuringPeriodValueSharebasedCompensationandOther" abstract="false" name="StockIssuedDuringPeriodValueSharebasedCompensationandOther" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ago_PaymentsforProceedsfromShorttermInvestmentswithMaturitiesofLessThanThreeMonths" abstract="false" name="PaymentsforProceedsfromShorttermInvestmentswithMaturitiesofLessThanThreeMonths" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ago_ProceedsfromPaydownsonFinancialGuarantyVariableInterestEntitiesAssets" abstract="false" name="ProceedsfromPaydownsonFinancialGuarantyVariableInterestEntitiesAssets" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ago_PaydownOfFinancialGuarantyVariableInterestEntitiesLiabilities" abstract="false" name="PaydownOfFinancialGuarantyVariableInterestEntitiesLiabilities" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ago_CashFlowsFromConsolidatedInvestmentVehiclesAbstract" abstract="true" name="CashFlowsFromConsolidatedInvestmentVehiclesAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ago_RepaymentsOfCollateralizedLoanObligations" abstract="false" name="RepaymentsOfCollateralizedLoanObligations" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ago_RepaymentofWarehouseLoansandEquity" abstract="false" name="RepaymentofWarehouseLoansandEquity" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ago_DistributionsToNoncontrollingInterestsFromInvestmentVehicles" abstract="false" name="DistributionsToNoncontrollingInterestsFromInvestmentVehicles" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ago_NoncashOrPartNoncashAcquisitionInvestmentsAcquiredAvailableForSale" abstract="false" name="NoncashOrPartNoncashAcquisitionInvestmentsAcquiredAvailableForSale" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ago_NoncashContributionsFromNoncontrollingInterests" abstract="false" name="NoncashContributionsFromNoncontrollingInterests" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ago_NoncashDistributionsToNoncontrollingInterests" abstract="false" name="NoncashDistributionsToNoncontrollingInterests" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ago_ReconciliationOfCashAndRestrictedCashToConsolidateBalanceSheetAbstract" abstract="true" name="ReconciliationOfCashAndRestrictedCashToConsolidateBalanceSheetAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ago_CashofConsolidatedInvestmentVehicles" abstract="false" name="CashofConsolidatedInvestmentVehicles" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ago_OutstandingExposureDisclosureAbstract" abstract="true" name="OutstandingExposureDisclosureAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ago_OutstandingExposureTextBlock" abstract="false" name="OutstandingExposureTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="ago_ExpectedLossesAbstract" abstract="true" name="ExpectedLossesAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ago_ExpectedLossToBePaidTextBlock" abstract="false" name="ExpectedLossToBePaidTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="ago_FinancialGuarantyInsuranceTextBlock" abstract="false" name="FinancialGuarantyInsuranceTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="ago_ScheduleofInsuredContractualPaymentsOutstandingTableTextBlock" abstract="false" name="ScheduleofInsuredContractualPaymentsOutstandingTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="ago_ScheduleofFinancialGuarantyObligationsbyInternalRatingTableTextBlock" abstract="false" name="ScheduleofFinancialGuarantyObligationsbyInternalRatingTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="ago_ScheduleOfInsuredFinancialObligationsBelowInvestmentGradeTableTextBlock" abstract="false" name="ScheduleOfInsuredFinancialObligationsBelowInvestmentGradeTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="ago_GrossParandGrossDebtServiceOutstandingTableTextBlock" abstract="false" name="GrossParandGrossDebtServiceOutstandingTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="ago_ScheduleofGeographicExposureofNetParOutstandingTableTextBlock" abstract="false" name="ScheduleofGeographicExposureofNetParOutstandingTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="ago_ScheduleofNonFinancialGuarantyExposureTableTextBlock" abstract="false" name="ScheduleofNonFinancialGuarantyExposureTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="ago_ScheduleofNetExpectedLossestobePaidTableTextBlock" abstract="false" name="ScheduleofNetExpectedLossestobePaidTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="ago_PresentValueOfNetExpectedLossAndLossAdjustmentExpensesToBePaidRollForwardTableTextBlock" abstract="false" name="PresentValueOfNetExpectedLossAndLossAdjustmentExpensesToBePaidRollForwardTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="ago_ScheduleOfNetExpectedLossesToBePaidRecoveredAndNetEconomicDevelopmentBenefitLossTableTextBlock" abstract="false" name="ScheduleOfNetExpectedLossesToBePaidRecoveredAndNetEconomicDevelopmentBenefitLossTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="ago_ScheduleOfEstimatedExpectedLossesAssumptionsFirstLienRmbsTableTextBlock" abstract="false" name="ScheduleOfEstimatedExpectedLossesAssumptionsFirstLienRmbsTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="ago_ScheduleOfEstimatedExpectedLossesAssumptionsSecondLienRmbsTableTextBlock" abstract="false" name="ScheduleOfEstimatedExpectedLossesAssumptionsSecondLienRmbsTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="ago_FinancialGuaranteeInsuranceContractsNetEarnedPremiumsTableTextBlock" abstract="false" name="FinancialGuaranteeInsuranceContractsNetEarnedPremiumsTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="ago_FinancialGuaranteeInsuranceContractsPremiumReceivableActivityTableTextBlock" abstract="false" name="FinancialGuaranteeInsuranceContractsPremiumReceivableActivityTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="ago_FinancialGuaranteeInsuranceContractsPoliciesPaidinInstallmentsTableTextBlock" abstract="false" name="FinancialGuaranteeInsuranceContractsPoliciesPaidinInstallmentsTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="ago_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseAndSalvageAndSubrogationRecoveriesTableTextBlock" abstract="false" name="LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseAndSalvageAndSubrogationRecoveriesTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="ago_ReconciliationOfNetExpectedLossToBePaidAndNetExpectedLossToBeExpensedTableTextBlock" abstract="false" name="ReconciliationOfNetExpectedLossToBePaidAndNetExpectedLossToBeExpensedTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="ago_FinancialGuarantyInsuranceContractsExpectedFutureRecognitionOfPremiumsAndLossesTableTextBlock" abstract="false" name="FinancialGuarantyInsuranceContractsExpectedFutureRecognitionOfPremiumsAndLossesTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="ago_FinancialGuarantyInsuranceContractsLossAndLossAdjustmentExpenseAmountsIncludedInEarningsTableTextBlock" abstract="false" name="FinancialGuarantyInsuranceContractsLossAndLossAdjustmentExpenseAmountsIncludedInEarningsTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="ago_ScheduleofCreditDerivativeInstrumentsNetChangeinFairValueTableTextBlock" abstract="false" name="ScheduleofCreditDerivativeInstrumentsNetChangeinFairValueTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="ago_ScheduleOfCreditSpreadEffectOnCreditDerivativesFairValueTableTextBlock" abstract="false" name="ScheduleOfCreditSpreadEffectOnCreditDerivativesFairValueTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="ago_ScheduleOfRevenueDomesticAndForeignTableTextBlock" abstract="false" name="ScheduleOfRevenueDomesticAndForeignTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="ago_ScheduleOfShareRepurchasesTableTextBlock" abstract="false" name="ScheduleOfShareRepurchasesTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="ago_SoundPointAgreementMember" abstract="true" name="SoundPointAgreementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ago_ConsolidatedInvestmentVehiclesMember" abstract="true" name="ConsolidatedInvestmentVehiclesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ago_AssuredGuarantyMunicipalCorp.Member" abstract="true" name="AssuredGuarantyMunicipalCorp.Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ago_AssuredGuarantyIncMember" abstract="true" name="AssuredGuarantyIncMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ago_DisposalGroupIncludingDiscontinuedOperationConsiderationEquityInterestOwnershipPercentage" abstract="false" name="DisposalGroupIncludingDiscontinuedOperationConsiderationEquityInterestOwnershipPercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="ago_DiscontinuedOperationContinuingInvolvementTermToMakeNewInvestments" abstract="false" name="DiscontinuedOperationContinuingInvolvementTermToMakeNewInvestments" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="ago_DiscontinuedOperationContinuingInvolvementTermToReinvestAllReturnsOfCapital" abstract="false" name="DiscontinuedOperationContinuingInvolvementTermToReinvestAllReturnsOfCapital" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="ago_VariableInterestEntityNumberOfRemainingEntities" abstract="false" name="VariableInterestEntityNumberOfRemainingEntities" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="ago_PaymentsInExchangeForRedemptionOfCommonStock" abstract="false" name="PaymentsInExchangeForRedemptionOfCommonStock" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ago_HoldingCompanieswithOutstandingPublicDebtNumber" abstract="false" name="HoldingCompanieswithOutstandingPublicDebtNumber" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="ago_InsuranceSegmentMember" abstract="true" name="InsuranceSegmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ago_AssetManagementSegmentMember" abstract="true" name="AssetManagementSegmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ago_OperatingSegmentsExcludingIntersegmentEliminationMember" abstract="true" name="OperatingSegmentsExcludingIntersegmentEliminationMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ago_OperatingSegmentsAndCorporateNonSegmentMember" abstract="true" name="OperatingSegmentsAndCorporateNonSegmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ago_OtherOperatingSegmentsAndIntersegmentEliminationsMember" abstract="true" name="OtherOperatingSegmentsAndIntersegmentEliminationsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ago_ReconcilingItemsAxis" abstract="true" name="ReconcilingItemsAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="ago_ReconcilingItemsDomain" abstract="true" name="ReconcilingItemsDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ago_NonCreditImpairmentRelatedUnrealizedFairValueGainsLossesOnCreditDerivativesMember" abstract="true" name="NonCreditImpairmentRelatedUnrealizedFairValueGainsLossesOnCreditDerivativesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ago_FairValueGainsLossesOnCommittedCapitalSecuritiesMember" abstract="true" name="FairValueGainsLossesOnCommittedCapitalSecuritiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ago_ForeignExchangeGainsLossesOnRemeasurmentOfPremiumsReceivableAndLossMember" abstract="true" name="ForeignExchangeGainsLossesOnRemeasurmentOfPremiumsReceivableAndLossMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ago_IncomeTaxExpenseBenefitMember" abstract="true" name="IncomeTaxExpenseBenefitMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ago_ScheduleofInsuredFinancialObligationsTable" abstract="true" name="ScheduleofInsuredFinancialObligationsTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="ago_CommitmenttoProvideGuaranteesMember" abstract="true" name="CommitmenttoProvideGuaranteesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ago_PublicFinanceMember" abstract="true" name="PublicFinanceMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ago_LoansInsuredOrGuaranteeForGovernmentAuthoritiesAxis" abstract="true" name="LoansInsuredOrGuaranteeForGovernmentAuthoritiesAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="ago_LoansInsuredOrGuaranteeForGovernmentAuthoritiesDomain" abstract="true" name="LoansInsuredOrGuaranteeForGovernmentAuthoritiesDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ago_PuertoRicoHighwaysAndTransportationAuthorityMember" abstract="true" name="PuertoRicoHighwaysAndTransportationAuthorityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ago_PuertoRicoDefaultedExposuresSubjectToAPlanSupportAgreementMember" abstract="true" name="PuertoRicoDefaultedExposuresSubjectToAPlanSupportAgreementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ago_PuertoRicoTransportationAuthorityMember" abstract="true" name="PuertoRicoTransportationAuthorityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ago_PuertoRicoHighwaysAuthorityMember" abstract="true" name="PuertoRicoHighwaysAuthorityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ago_PuertoRicoElectricPowerAuthorityMember" abstract="true" name="PuertoRicoElectricPowerAuthorityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ago_PuertoRicoMunicipalFinanceAuthorityMember" abstract="true" name="PuertoRicoMunicipalFinanceAuthorityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ago_ScheduleofInsuredFinancialObligationsLineItems" abstract="true" name="ScheduleofInsuredFinancialObligationsLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ago_NumberOfSurveillanceCategories" abstract="false" name="NumberOfSurveillanceCategories" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="ago_InsuredFinancialObligationsProbabilityofPayingMoreClaimsthanReimbursedPercentage" abstract="false" name="InsuredFinancialObligationsProbabilityofPayingMoreClaimsthanReimbursedPercentage" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="ago_InsuredFinancialObligationsMaximumPeriodofLiquidityClaims" abstract="false" name="InsuredFinancialObligationsMaximumPeriodofLiquidityClaims" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="ago_InsuredFinancialObligationsLossMitigationSecurities" abstract="false" name="InsuredFinancialObligationsLossMitigationSecurities" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ago_PotentialFutureCommitment" abstract="false" name="PotentialFutureCommitment" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ago_InsuredFinancialObligationsOutstandingPrincipalAmountNet" abstract="false" name="InsuredFinancialObligationsOutstandingPrincipalAmountNet" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ago_LossContingencyDamagesSoughtEstimate" abstract="false" name="LossContingencyDamagesSoughtEstimate" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ago_LossContingencyStayImplemented" abstract="false" name="LossContingencyStayImplemented" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="ago_SpecialtyBusinessGrossPar" abstract="false" name="SpecialtyBusinessGrossPar" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ago_SpecialtyBusinessNetPar" abstract="false" name="SpecialtyBusinessNetPar" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="ago_FinancialGuaranteeAccountedforasCreditDerivativesMember" abstract="true" name="FinancialGuaranteeAccountedforasCreditDerivativesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ago_GuarantorObligationsNetExpectedLosstobePaidAfterRecoveriesforRepresentationsandWarranties" abstract="false" name="GuarantorObligationsNetExpectedLosstobePaidAfterRecoveriesforRepresentationsandWarranties" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ago_GuarantorObligationsNetExpectedLossDevelopmentAfterRecoveriesforRepresentationsandWarranties" abstract="false" name="GuarantorObligationsNetExpectedLossDevelopmentAfterRecoveriesforRepresentationsandWarranties" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ago_PresentValueOfNetExpectedLossAndLossAdjustmentExpensesToBePaidRollForward" abstract="true" name="PresentValueOfNetExpectedLossAndLossAdjustmentExpensesToBePaidRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ago_GuarantorObligationsNetExpectedLossDevelopmentAfterRecoveriesforRepresentationsandWarrantiesAccretionOfDiscount" abstract="false" name="GuarantorObligationsNetExpectedLossDevelopmentAfterRecoveriesforRepresentationsandWarrantiesAccretionOfDiscount" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ago_GuarantorObligationsNetExpectedLossDevelopmentAfterRecoveriesforRepresentationsandWarrantiesChangesInDiscountRates" abstract="false" name="GuarantorObligationsNetExpectedLossDevelopmentAfterRecoveriesforRepresentationsandWarrantiesChangesInDiscountRates" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ago_GuarantorObligationsNetExpectedLossDevelopmentAfterRecoveriesforRepresentationsandWarrantiesChangesInTimingAndAssumptions" abstract="false" name="GuarantorObligationsNetExpectedLossDevelopmentAfterRecoveriesforRepresentationsandWarrantiesChangesInTimingAndAssumptions" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ago_GuarantorObligationsLiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidAfterRecoveriesforRepresentationsandWarranties" abstract="false" name="GuarantorObligationsLiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidAfterRecoveriesforRepresentationsandWarranties" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ago_InsuredFinancialObligationsClaimLiabilityRiskFreeDiscountRate" abstract="false" name="InsuredFinancialObligationsClaimLiabilityRiskFreeDiscountRate" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="ago_InsuredFinancialObligationsClaimLiabilityWeightedAverageRiskFreeDiscountRate" abstract="false" name="InsuredFinancialObligationsClaimLiabilityWeightedAverageRiskFreeDiscountRate" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="ago_GuarantorObligationsNetExpectedLosstobePaidAfterRecoveriesforRepresentationsandWarrantiesPercent" abstract="false" name="GuarantorObligationsNetExpectedLosstobePaidAfterRecoveriesforRepresentationsandWarrantiesPercent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="ago_ReinsuranceRecoverablesPeriodafterEndofReportingPeriodforSettlementofCededPaidLosses" abstract="false" name="ReinsuranceRecoverablesPeriodafterEndofReportingPeriodforSettlementofCededPaidLosses" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="ago_FinancingReceivablePeriodPastDueAxis" abstract="true" name="FinancingReceivablePeriodPastDueAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="ago_FinancingReceivablePeriodPastDueDomain" abstract="true" name="FinancingReceivablePeriodPastDueDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ago_FinancingReceivableDelinquentModifiedinPrevious12MonthsMember" abstract="true" name="FinancingReceivableDelinquentModifiedinPrevious12MonthsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ago_FinancingReceivablesBankruptcyMember" abstract="true" name="FinancingReceivablesBankruptcyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ago_FinancingReceivableForeclosureMember" abstract="true" name="FinancingReceivableForeclosureMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ago_FinancingReceivableRealEstateOwnedMember" abstract="true" name="FinancingReceivableRealEstateOwnedMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ago_InsuredFinancialObligationsProjectedLossAssumptionsConditionalDefaultRatePlateau" abstract="false" name="InsuredFinancialObligationsProjectedLossAssumptionsConditionalDefaultRatePlateau" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
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  <xs:element id="ago_InsuredFinancialObligationsProjectedLossAssumptionsLiquidationRate" abstract="false" name="InsuredFinancialObligationsProjectedLossAssumptionsLiquidationRate" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="ago_InsuredFinancialObligationsProjectedLossAssumptionsLossSeverityInitialRate" abstract="false" name="InsuredFinancialObligationsProjectedLossAssumptionsLossSeverityInitialRate" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="ago_LossRecoveryAssumptionofChargedOffLoansEstimatedFutureRecoveriesPercent" abstract="false" name="LossRecoveryAssumptionofChargedOffLoansEstimatedFutureRecoveriesPercent" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="ago_FinancialGuaranteeInsuranceContractsScheduledNetEarnedPremiums" abstract="false" name="FinancialGuaranteeInsuranceContractsScheduledNetEarnedPremiums" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="ago_FinancialGuaranteeInsuranceContractsPremiumsEarnedNet" abstract="false" name="FinancialGuaranteeInsuranceContractsPremiumsEarnedNet" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ago_PremiumsEarnedNetSpecialtyInsuranceandReinsurance" abstract="false" name="PremiumsEarnedNetSpecialtyInsuranceandReinsurance" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="ago_FinancialGuaranteeInsuranceContractsPremiumsReceivableAdjustmentForeignExchangeTranslation" abstract="false" name="FinancialGuaranteeInsuranceContractsPremiumsReceivableAdjustmentForeignExchangeTranslation" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ago_ForeignCurrencyConcentrationRiskMember" abstract="true" name="ForeignCurrencyConcentrationRiskMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ago_FinancialGuaranteeInsurancePremiumsTable" abstract="true" name="FinancialGuaranteeInsurancePremiumsTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="ago_FinancialGuaranteeInsurancePremiumsLineItems" abstract="true" name="FinancialGuaranteeInsurancePremiumsLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ago_FuturePremiumsToBeCollectedAbstract" abstract="true" name="FuturePremiumsToBeCollectedAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ago_FinancialGuaranteeInsuranceContractsPremiumReceivablePremiumExpectedtobeCollectedBeyondYear20" abstract="false" name="FinancialGuaranteeInsuranceContractsPremiumReceivablePremiumExpectedtobeCollectedBeyondYear20" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ago_FutureNetPremiumsToBeEarnedAbstract" abstract="true" name="FutureNetPremiumsToBeEarnedAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ago_FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenuetobeRecognizedBeyondYear20" abstract="false" name="FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenuetobeRecognizedBeyondYear20" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="ago_LiabilityforClaimsandClaimsAdjustmentExpenseIncludingSalvageandSubrogationRecoverableTable" abstract="true" name="LiabilityforClaimsandClaimsAdjustmentExpenseIncludingSalvageandSubrogationRecoverableTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="ago_NonUnitedStatesMember" abstract="true" name="NonUnitedStatesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ago_FinancialGuaranteeInsuranceAndOtherProductLineMember" abstract="true" name="FinancialGuaranteeInsuranceAndOtherProductLineMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ago_LiabilityforClaimsandClaimsAdjustmentExpenseIncludingSalvageandSubrogationRecoverableLineItems" abstract="true" name="LiabilityforClaimsandClaimsAdjustmentExpenseIncludingSalvageandSubrogationRecoverableLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ago_ReserveForLossesAndLossAdjustmentExpensesNetOfReinsuranceAndSalvageAndSubrogationRecoveries" abstract="false" name="ReserveForLossesAndLossAdjustmentExpensesNetOfReinsuranceAndSalvageAndSubrogationRecoveries" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="ago_FinancialGuaranteeInsuranceContractsFutureExpectedNetLossToBeExpensedDuringThirdQuarterFollowingBalanceSheetDate" abstract="false" name="FinancialGuaranteeInsuranceContractsFutureExpectedNetLossToBeExpensedDuringThirdQuarterFollowingBalanceSheetDate" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ago_FinancialGuaranteeInsuranceContractsFutureExpectedNetLossToBeExpensedDuringFourthQuarterFollowingBalanceSheetDate" abstract="false" name="FinancialGuaranteeInsuranceContractsFutureExpectedNetLossToBeExpensedDuringFourthQuarterFollowingBalanceSheetDate" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ago_FinancialGuaranteeInsuranceContractsFutureExpectedNetLossToBeExpensedDuringRemainderOfFiscalYearFollowingBalanceSheetDate" abstract="false" name="FinancialGuaranteeInsuranceContractsFutureExpectedNetLossToBeExpensedDuringRemainderOfFiscalYearFollowingBalanceSheetDate" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ago_FinancialGuaranteeInsuranceContractsFutureExpectedNetLossToBeExpensedInFirstFullFiscalYear" abstract="false" name="FinancialGuaranteeInsuranceContractsFutureExpectedNetLossToBeExpensedInFirstFullFiscalYear" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="ago_FinancialGuaranteeInsuranceContractsFutureExpectedNetLosstobeExpensedinThirdFullFiscalYear" abstract="false" name="FinancialGuaranteeInsuranceContractsFutureExpectedNetLosstobeExpensedinThirdFullFiscalYear" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="ago_FinancialGuaranteeInsuranceContractsFutureExpectedNetLossToBeExpensedMoreThanFourAndWithin9YearsFromBalanceSheetDate" abstract="false" name="FinancialGuaranteeInsuranceContractsFutureExpectedNetLossToBeExpensedMoreThanFourAndWithin9YearsFromBalanceSheetDate" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="ago_FinancialGuaranteeInsuranceContractsFutureExpectedNetLossToBeExpensedMoreThan14AndWithin19YearsFromBalanceSheetDate" abstract="false" name="FinancialGuaranteeInsuranceContractsFutureExpectedNetLossToBeExpensedMoreThan14AndWithin19YearsFromBalanceSheetDate" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="ago_ScheduleofInsuredFinancialObligationswithCreditDeteriorationStatementofFinancialPositionUnearnedPremiumRevenueNetofReinsuranceRecoverable" abstract="false" name="ScheduleofInsuredFinancialObligationswithCreditDeteriorationStatementofFinancialPositionUnearnedPremiumRevenueNetofReinsuranceRecoverable" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ago_ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReservesSalvageAbstract" abstract="true" name="ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReservesSalvageAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ago_LiabilityforUnpaidClaimsandClaimsAdjustmentExpenseNetofReinsuranceandSalvageSubrogationandOtherRecoveries" abstract="false" name="LiabilityforUnpaidClaimsandClaimsAdjustmentExpenseNetofReinsuranceandSalvageSubrogationandOtherRecoveries" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="ago_InvestmentsAccountedForAsConsolidatedInvestmentVehicles" abstract="false" name="InvestmentsAccountedForAsConsolidatedInvestmentVehicles" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="ago_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionGreaterThan10PercentOfBookValueTwelveMonthsOrLongerNumber" abstract="false" name="AvailableForSaleSecuritiesContinuousUnrealizedLossPositionGreaterThan10PercentOfBookValueTwelveMonthsOrLongerNumber" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="ago_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerGreaterThan10PercentBookValueAggregateLosses" abstract="false" name="AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerGreaterThan10PercentBookValueAggregateLosses" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="ago_SecuritiesManagedExternallyMember" abstract="true" name="SecuritiesManagedExternallyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
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  <xs:element id="ago_GovernmentAgencyObligationsAsPercentageOfTotalMortgageBackedSecurities" abstract="false" name="GovernmentAgencyObligationsAsPercentageOfTotalMortgageBackedSecurities" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="ago_DeptSecurityAvailableforsaleSecuritiesContinuousUnrealizedLossPositionAbstract" abstract="true" name="DeptSecurityAvailableforsaleSecuritiesContinuousUnrealizedLossPositionAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ago_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAbstract" abstract="true" name="AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
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  <xs:element id="ago_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAggregateAbstract" abstract="true" name="AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAggregateAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ago_RecoveryBondsMember" abstract="true" name="RecoveryBondsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
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  <xs:element id="ago_OtherNetRealizedInvestmentGainsLosses" abstract="false" name="OtherNetRealizedInvestmentGainsLosses" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="ago_VariableInterestEntityNumberofPoliciesthatContainProvisionsforConsolidation" abstract="false" name="VariableInterestEntityNumberofPoliciesthatContainProvisionsforConsolidation" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
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  <xs:element id="ago_FairValueOptionLiabilitieswithRecourseUnpaidPrincipalBalance" abstract="false" name="FairValueOptionLiabilitieswithRecourseUnpaidPrincipalBalance" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="ago_EquitySecuritiesandWarrantsMember" abstract="true" name="EquitySecuritiesandWarrantsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ago_StructuredProductsMember" abstract="true" name="StructuredProductsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ago_AGAndAGMMember" abstract="true" name="AGAndAGMMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ago_AvailableforsaleDebtSecuritiesNumberofInstruments" abstract="false" name="AvailableforsaleDebtSecuritiesNumberofInstruments" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="ago_FinancialInstrumentsSubjecttoMandatoryRedemptionSettlementTermsNumberofCustodialTrusts" abstract="false" name="FinancialInstrumentsSubjecttoMandatoryRedemptionSettlementTermsNumberofCustodialTrusts" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="ago_PercentageOfCDSContractsFairValuedUsingMinimumPremium" abstract="false" name="PercentageOfCDSContractsFairValuedUsingMinimumPremium" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="ago_NumberOfFixedMaturityDebtSecuritiesClassifiedAsLevel3" abstract="false" name="NumberOfFixedMaturityDebtSecuritiesClassifiedAsLevel3" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
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  <xs:element id="ago_VariableInterestEntityAssetsMember" abstract="true" name="VariableInterestEntityAssetsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
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  <xs:element id="ago_TotalPretaxRealizedAndUnrealizedGainsLossesRecordedAsAssetsAbstract" abstract="true" name="TotalPretaxRealizedAndUnrealizedGainsLossesRecordedAsAssetsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ago_TotalPretaxRealizedAndUnrealizedGainsLossesRecordedAsNetDerivativeAssetLiabilityAbstract" abstract="true" name="TotalPretaxRealizedAndUnrealizedGainsLossesRecordedAsNetDerivativeAssetLiabilityAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ago_LiabilitiesofConsolidatedInvestmentVehiclesMember" abstract="true" name="LiabilitiesofConsolidatedInvestmentVehiclesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ago_TotalPretaxRealizedAndUnrealizedGainsLossesRecordedAsLiabilitiesAbstract" abstract="true" name="TotalPretaxRealizedAndUnrealizedGainsLossesRecordedAsLiabilitiesAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
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  <xs:element id="ago_FairValueYearOneLossEstimate" abstract="false" name="FairValueYearOneLossEstimate" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
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  <xs:element id="ago_IncomeTaxBenefitPeriodOfRecognition" abstract="false" name="IncomeTaxBenefitPeriodOfRecognition" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="ago_DeferredTaxAssetsRealizationAssessmentPeriodForWhichCumulativeOperatingIncomeConsidered" abstract="false" name="DeferredTaxAssetsRealizationAssessmentPeriodForWhichCumulativeOperatingIncomeConsidered" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="ago_DeferredTaxAssetsLiabilitiesNetCurrent1" abstract="false" name="DeferredTaxAssetsLiabilitiesNetCurrent1" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="ago_PreTaxIncomeTaxesAndRevenueLineItems" abstract="true" name="PreTaxIncomeTaxesAndRevenueLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ago_EffectiveIncomeTaxRateReconciliationGlobalMinimumTaxAmount" abstract="false" name="EffectiveIncomeTaxRateReconciliationGlobalMinimumTaxAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ago_LehmanBrothersInternationalEuropeVsAgFinancialProductsIncMember" abstract="true" name="LehmanBrothersInternationalEuropeVsAgFinancialProductsIncMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
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  <xs:element id="ago_LossContingencyCreditDerivativeTransactionImproperlyTerminatedAsPerTheAllegationsOfThePlaintiffNumber" abstract="false" name="LossContingencyCreditDerivativeTransactionImproperlyTerminatedAsPerTheAllegationsOfThePlaintiffNumber" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
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  <xs:element id="ago_LitigationSettlementAmountAwardedFromOtherPartyAnnualInterestRate" abstract="false" name="LitigationSettlementAmountAwardedFromOtherPartyAnnualInterestRate" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="ago_GainContingencyDamagesSoughtValue" abstract="false" name="GainContingencyDamagesSoughtValue" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ago_StockRepurchaseProgramAdditionalAuthorizedAmount" abstract="false" name="StockRepurchaseProgramAdditionalAuthorizedAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
</xs:schema>
