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  <xsd:element id="ambc_FairValueMeasurementProcessDescriptionForCreditDerivativesBaseFee" name="FairValueMeasurementProcessDescriptionForCreditDerivativesBaseFee" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="ambc_FairValueMeasurementProcessDescriptionForCreditDerivativesBaseReferenceObligationSpread" name="FairValueMeasurementProcessDescriptionForCreditDerivativesBaseReferenceObligationSpread" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="ambc_FairValueMeasurementProcessDescriptionForCreditDerivativesBaseRelativeChangeRatio" name="FairValueMeasurementProcessDescriptionForCreditDerivativesBaseRelativeChangeRatio" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="ambc_FairValueMeasurementProcessDescriptionForCreditDerivativesFullRelativeChangeRatio" name="FairValueMeasurementProcessDescriptionForCreditDerivativesFullRelativeChangeRatio" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="ambc_FairValueMeasurementProcessDescriptionForCreditDerivativesHypotheticalIncrementalFee" name="FairValueMeasurementProcessDescriptionForCreditDerivativesHypotheticalIncrementalFee" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="ambc_FairValueMeasurementProcessDescriptionForCreditDerivativesHypotheticalIncrementalFeeWithCreditDeterioration" name="FairValueMeasurementProcessDescriptionForCreditDerivativesHypotheticalIncrementalFeeWithCreditDeterioration" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="ambc_FairValueMeasurementProcessDescriptionForCreditDerivativesRemainingLife" name="FairValueMeasurementProcessDescriptionForCreditDerivativesRemainingLife" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element id="ambc_FairValueMeasurementProcessDescriptionForCreditDerivativesRevisedHypotheticalFee" name="FairValueMeasurementProcessDescriptionForCreditDerivativesRevisedHypotheticalFee" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="ambc_FairValueMeasurementProcessDescriptionForCreditDerivativesRevisedHypotheticalFeeWithCreditDownGrade" name="FairValueMeasurementProcessDescriptionForCreditDerivativesRevisedHypotheticalFeeWithCreditDownGrade" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="ambc_FairValueMeasurementProcessDescriptionForCreditDerivativesRevisedHypotheticalReferenceObligationSpreadTwo" name="FairValueMeasurementProcessDescriptionForCreditDerivativesRevisedHypotheticalReferenceObligationSpreadTwo" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="ambc_FairValueMeasurementProcessDescriptionForCreditDerivativesRevisedRelativeChangeRatio" name="FairValueMeasurementProcessDescriptionForCreditDerivativesRevisedRelativeChangeRatio" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="ambc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOrLiability" name="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOrLiability" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="ambc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOrLiabilityAdditionsOfConsolidatedVies" name="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOrLiabilityAdditionsOfConsolidatedVies" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="ambc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOrLiabilityDeconsolidationOfVies" name="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOrLiabilityDeconsolidationOfVies" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="ambc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOrLiabilityGainLossIncludedInEarnings" name="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOrLiabilityGainLossIncludedInEarnings" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="ambc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOrLiabilityGainLossIncludedInOtherComprehensiveIncomeLoss" name="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOrLiabilityGainLossIncludedInOtherComprehensiveIncomeLoss" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="ambc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOrLiabilityIssues" name="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOrLiabilityIssues" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="ambc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOrLiabilityPurchases" name="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOrLiabilityPurchases" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="ambc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOrLiabilitySales" name="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOrLiabilitySales" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="ambc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOrLiabilitySettlements" name="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOrLiabilitySettlements" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="ambc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOrLiabilityTransfersIntoLevelThree" name="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOrLiabilityTransfersIntoLevelThree" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="ambc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOrLiabilityTransfersOutOfLevelThree" name="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOrLiabilityTransfersOutOfLevelThree" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_FairValueOfAssetsAndLiabilitiesMeasuredOnNonRecurringBasisLineItems" name="FairValueOfAssetsAndLiabilitiesMeasuredOnNonRecurringBasisLineItems" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="ambc_FairValueOfCashAndSecuritiesPledgedToDerivativeCounterparties" name="FairValueOfCashAndSecuritiesPledgedToDerivativeCounterparties" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="ambc_FairValueOfCashAndSecuritiesPledgedToInvestmentAndRepurchaseAgreementCounterparties" name="FairValueOfCashAndSecuritiesPledgedToInvestmentAndRepurchaseAgreementCounterparties" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="ambc_FairValueOfCashAndUnderlyingSecurities" name="FairValueOfCashAndUnderlyingSecurities" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="ambc_FairValueOfConsolidatedVariableInterestEntityDebtObligationsValuedUsingUnobservableInputsByAssetClass" name="FairValueOfConsolidatedVariableInterestEntityDebtObligationsValuedUsingUnobservableInputsByAssetClass" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="ambc_FairValueOfSecuritiesDepositedWithGovernmentalAuthorities" name="FairValueOfSecuritiesDepositedWithGovernmentalAuthorities" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="ambc_FairValueofSecuritiesPlacedinTrust" name="FairValueofSecuritiesPlacedinTrust" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="ambc_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeTableTextBlock" name="FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="ambc_FinancialAndDerivativeAssetsGrossRecognizedAmount" name="FinancialAndDerivativeAssetsGrossRecognizedAmount" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="ambc_FinancialAndDerivativeLiabilityGrossRecognizedAmount" name="FinancialAndDerivativeLiabilityGrossRecognizedAmount" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="ambc_FinancialGuaranteeGrossOutstandingPrincipalAssumedFromThirdParties" name="FinancialGuaranteeGrossOutstandingPrincipalAssumedFromThirdParties" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="ambc_FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenueToBeRecognizedMoreThanFortyAndWithinFortyFiveYearsFromBalanceSheetDate" name="FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenueToBeRecognizedMoreThanFortyAndWithinFortyFiveYearsFromBalanceSheetDate" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="ambc_FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedMoreThanFortyAndWithinFortyFiveYearsFromBalanceSheetDate" name="FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedMoreThanFortyAndWithinFortyFiveYearsFromBalanceSheetDate" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="ambc_FinancialGuaranteeInsuranceContractsPremiumReceivableActivityTableTextBlock" name="FinancialGuaranteeInsuranceContractsPremiumReceivableActivityTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="ambc_FinancialGuaranteeInsuranceContractsPremiumReceivableDeconsolidationOfCertainVariableInterestEntity" name="FinancialGuaranteeInsuranceContractsPremiumReceivableDeconsolidationOfCertainVariableInterestEntity" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="ambc_FinancialGuaranteeInsuranceContractsPremiumReceivablePremiumExpectedToBeCollectedAndFutureExpectedPremiumsEarnedTableTextBlock" name="FinancialGuaranteeInsuranceContractsPremiumReceivablePremiumExpectedToBeCollectedAndFutureExpectedPremiumsEarnedTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_FinancialServicesDerivativesProductsMember" name="FinancialServicesDerivativesProductsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_FinancialServicesMember" name="FinancialServicesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_FixedIncomeInvestmentsAndOtherInvestmentsMember" name="FixedIncomeInvestmentsAndOtherInvestmentsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_FuturesContractsMember" name="FuturesContractsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_GainslossesonsecuritiesheldasofreportingdateMember" name="GainslossesonsecuritiesheldasofreportingdateMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_GlobalPublicFinanceMember" name="GlobalPublicFinanceMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_GlobalStructuredFinanceMember" name="GlobalStructuredFinanceMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="ambc_GoodwillWrittenoffRelatedtoBankruptcyClaimBankruptcyClaim" name="GoodwillWrittenoffRelatedtoBankruptcyClaimBankruptcyClaim" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="ambc_GuaranteedInvestmentAgreementsFairValueDisclosure" name="GuaranteedInvestmentAgreementsFairValueDisclosure" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="ambc_IlliquidInvestmentsMember" name="IlliquidInvestmentsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="ambc_ImpactOfSponsorActionsInResidentialMortgageBackedSecuritiesSubrogation" name="ImpactOfSponsorActionsInResidentialMortgageBackedSecuritiesSubrogation" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_IncomeLossOnVariableInterestEntitiesMember" name="IncomeLossOnVariableInterestEntitiesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_IncomeTaxExpenseBenefitRollForward" name="IncomeTaxExpenseBenefitRollForward" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_InsuranceAssetMember" name="InsuranceAssetMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_InsuranceIntangibleAssetMember" name="InsuranceIntangibleAssetMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_InsuranceLineItems" name="InsuranceLineItems" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_InsuranceTable" name="InsuranceTable" nillable="true" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="ambc_InterestPaidOnInvestmentAgreements" name="InterestPaidOnInvestmentAgreements" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="ambc_InterestPaidOnVariableInterestEntitySecuredBorrowing" name="InterestPaidOnVariableInterestEntitySecuredBorrowing" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_InterestRateSwapOneMember" name="InterestRateSwapOneMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="ambc_InterestRateonSecuritiesIssuedbyDelawareTrust" name="InterestRateonSecuritiesIssuedbyDelawareTrust" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="ambc_InvestmentIncomeInsuranceEntityShortTermInvestments" name="InvestmentIncomeInsuranceEntityShortTermInvestments" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="ambc_InvestmentIncomeInterestOnDebtSecurities" name="InvestmentIncomeInterestOnDebtSecurities" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="ambc_InvestmentIncomeInterestOnLoansReceivable" name="InvestmentIncomeInterestOnLoansReceivable" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_InvestmentPortfolioMember" name="InvestmentPortfolioMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_LessDiscountedRmbsSubrogationBeforeReinsuranceAbstract" name="LessDiscountedRmbsSubrogationBeforeReinsuranceAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="ambc_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseChangeInEstablishedSubrogationRecoveriesPriorYears" name="LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseChangeInEstablishedSubrogationRecoveriesPriorYears" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="ambc_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseChangeInLossReservesCurrentYear" name="LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseChangeInLossReservesCurrentYear" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="ambc_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseChangeInLossReservesPriorYear" name="LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseChangeInLossReservesPriorYear" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="ambc_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseChangeInPreviouslyEstablishedLossReservesPriorYears" name="LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseChangeInPreviouslyEstablishedLossReservesPriorYears" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseChangesInCurrentYearAbstract" name="LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseChangesInCurrentYearAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseChangesInPriorYearsAbstract" name="LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseChangesInPriorYearsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="ambc_LoansUnpaidPrincipalBalance" name="LoansUnpaidPrincipalBalance" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="ambc_LongTermDebtUnpaidPrincipalBalance" name="LongTermDebtUnpaidPrincipalBalance" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="ambc_LossAndLossAdjustmentExpenseReservesLineItems" name="LossAndLossAdjustmentExpenseReservesLineItems" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="ambc_LossReservesCededToReinsurers" name="LossReservesCededToReinsurers" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="ambc_LossReservesClaimLiabilityMember" name="LossReservesClaimLiabilityMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_LossandLossReservesAxis" name="LossandLossReservesAxis" nillable="true" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_LossandLossReservesDomain" name="LossandLossReservesDomain" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="ambc_MaximumAlternativeMinimumTaxTollingPaymentCredit" name="MaximumAlternativeMinimumTaxTollingPaymentCredit" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="ambc_MbiaInsuranceCorporationMember" name="MbiaInsuranceCorporationMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="ambc_MinimumSurplusAmount" name="MinimumSurplusAmount" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="ambc_MortgageAndOtherAssetBackedSecuritiesMember" name="MortgageAndOtherAssetBackedSecuritiesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_NationalCenturyFinancialEnterprisesIncMember" name="NationalCenturyFinancialEnterprisesIncMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_NationalPublicFinanceGuaranteeCorporationMember" name="NationalPublicFinanceGuaranteeCorporationMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_NetChangeInFairValueOfCreditDerivativesMember" name="NetChangeInFairValueOfCreditDerivativesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_NetIncomeLossReconciliationLineItems" name="NetIncomeLossReconciliationLineItems" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_NetIncomeLossReconciliationTable" name="NetIncomeLossReconciliationTable" nillable="true" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="ambc_NetOperatingLossCarryForwardsReducedForCancellationOfIndebtednessIncomeAndInterestExpense" name="NetOperatingLossCarryForwardsReducedForCancellationOfIndebtednessIncomeAndInterestExpense" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="ambc_NetOperatingLossPercentage" name="NetOperatingLossPercentage" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="ambc_NetParExposureForPoliciesAllocatedToSegregatedAccount" name="NetParExposureForPoliciesAllocatedToSegregatedAccount" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="ambc_NetUnrealizedLossesOnSecuritiesTaxEffect" name="NetUnrealizedLossesOnSecuritiesTaxEffect" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_NewYorkCityMember" name="NewYorkCityMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_NonAgencyRMBSMember" name="NonAgencyRMBSMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="ambc_NonCreditOtherThanTemporaryImpairmentsOnInvestments" name="NonCreditOtherThanTemporaryImpairmentsOnInvestments" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="ambc_NotionalPrincipalOutstandingOfCreditDerivativeContractsOnAdverselyClassifiedCreditListing" name="NotionalPrincipalOutstandingOfCreditDerivativeContractsOnAdverselyClassifiedCreditListing" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="ambc_NumberOfConsolidatedVariableInterestEntities" name="NumberOfConsolidatedVariableInterestEntities" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="ambc_NumberOfCreditDerivativeContractsOnAdverselyClassifiedCreditListing" name="NumberOfCreditDerivativeContractsOnAdverselyClassifiedCreditListing" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="ambc_NumberOfTransactionsOutstandingWithSponsoredSpecialPurposeEntities" name="NumberOfTransactionsOutstandingWithSponsoredSpecialPurposeEntities" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="ambc_NumberOfTransactionsWithSponsoredSpecialPurposeEntitiesInceptionToDate" name="NumberOfTransactionsWithSponsoredSpecialPurposeEntitiesInceptionToDate" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="ambc_NumberofDeConsolidatedVariableInterestEntities" name="NumberofDeConsolidatedVariableInterestEntities" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element id="ambc_NumberofRMBSSold" name="NumberofRMBSSold" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element id="ambc_NumberofVIEsAACTransferredAssetsTo" name="NumberofVIEsAACTransferredAssetsTo" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element id="ambc_NumberofVIEsLiquidated" name="NumberofVIEsLiquidated" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="ambc_OperatingTaxCarryforwardExpirationYearEnd" name="OperatingTaxCarryforwardExpirationYearEnd" nillable="true" substitutionGroup="xbrli:item" type="xbrli:gYearItemType" xbrli:periodType="duration" />
  <xsd:element id="ambc_OperatingTaxCarryforwardExpirationYearStart" name="OperatingTaxCarryforwardExpirationYearStart" nillable="true" substitutionGroup="xbrli:item" type="xbrli:gYearItemType" xbrli:periodType="duration" />
  <xsd:element id="ambc_OtherChangesRmbsSubrogation" name="OtherChangesRmbsSubrogation" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_OtherCommercialAssetBackedMember" name="OtherCommercialAssetBackedMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="ambc_OtherComprehensiveIncomeLossAmortizationPensionAndOtherPostretirementBenefitPlansNetPriorServiceCostRecognizedInNetPeriodicPensionCostNetOfTaxes" name="OtherComprehensiveIncomeLossAmortizationPensionAndOtherPostretirementBenefitPlansNetPriorServiceCostRecognizedInNetPeriodicPensionCostNetOfTaxes" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="ambc_OtherComprehensiveIncomeLossExcludingNoncontrollingInterestNetOfTax" name="OtherComprehensiveIncomeLossExcludingNoncontrollingInterestNetOfTax" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_OtherConsumerAssetBackedMember" name="OtherConsumerAssetBackedMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_OtherContractsMember" name="OtherContractsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_OtherInternationalMember" name="OtherInternationalMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="ambc_OtherInvestmentIncome" name="OtherInvestmentIncome" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="ambc_OtherInvestmentsIncome" name="OtherInvestmentsIncome" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="ambc_OtherShortTermInvestmentsAmortizedCost" name="OtherShortTermInvestmentsAmortizedCost" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="ambc_OtherThanTemporaryImpairmentsAdditionsForCreditImpairmentsRecognizedAbstract" name="OtherThanTemporaryImpairmentsAdditionsForCreditImpairmentsRecognizedAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_OtherThanTemporaryImpairmentsReductionsForCreditImpairmentsPreviouslyRecognizedAbstract" name="OtherThanTemporaryImpairmentsReductionsForCreditImpairmentsPreviouslyRecognizedAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="ambc_ParValueofSecuritiesPlacedinTrust" name="ParValueofSecuritiesPlacedinTrust" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="ambc_PaydownOfVariableInterestEntitySecuredBorrowing" name="PaydownOfVariableInterestEntitySecuredBorrowing" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="ambc_PaymentAsPercentageOfPermittedPolicyClaim" name="PaymentAsPercentageOfPermittedPolicyClaim" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="ambc_PaymentsFromDrawdownsOfBorrowingsUnderGuaranteedInvestmentAgreements" name="PaymentsFromDrawdownsOfBorrowingsUnderGuaranteedInvestmentAgreements" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="ambc_PercentageOfCreditDerivativeGrossParOutstandingUsingInternallyEstimatedReferenceObligationPricesInDeterminationOfFairValue" name="PercentageOfCreditDerivativeGrossParOutstandingUsingInternallyEstimatedReferenceObligationPricesInDeterminationOfFairValue" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="ambc_PercentageOfCreditDerivativeLiabilityUsingInternallyEstimatedReferenceObligationPricesInDeterminationOfFairValue" name="PercentageOfCreditDerivativeLiabilityUsingInternallyEstimatedReferenceObligationPricesInDeterminationOfFairValue" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="ambc_PercentageOfCreditDerivativesGrossParOutstandingUsingThirdPartyReferenceObligationQuotesInDeterminationOfFairValue" name="PercentageOfCreditDerivativesGrossParOutstandingUsingThirdPartyReferenceObligationQuotesInDeterminationOfFairValue" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="ambc_PercentageOfCreditDerivativesLiabilityUsingThirdPartyReferenceObligationQuotesInDeterminationOfFairValue" name="PercentageOfCreditDerivativesLiabilityUsingThirdPartyReferenceObligationQuotesInDeterminationOfFairValue" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="ambc_PercentageOfCreditValueAdjustment" name="PercentageOfCreditValueAdjustment" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="ambc_PercentageOfInvestmentPortfolioValuedUsingDealerQuotes" name="PercentageOfInvestmentPortfolioValuedUsingDealerQuotes" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="ambc_PercentageOfInvestmentPortfolioValuedUsingExternalPricingServices" name="PercentageOfInvestmentPortfolioValuedUsingExternalPricingServices" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="ambc_PercentageOfInvestmentPortfolioValuedUsingInternalValuationModels" name="PercentageOfInvestmentPortfolioValuedUsingInternalValuationModels" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="ambc_PercentageOfNotionalFederalTaxLiability" name="PercentageOfNotionalFederalTaxLiability" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="ambc_PercentageOfPremiumsReceivableRelatedToNonInvestmentGradeRmbsTransactions" name="PercentageOfPremiumsReceivableRelatedToNonInvestmentGradeRmbsTransactions" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="ambc_PercentageOfPremiumsReceivableRelatedToNonInvestmentGradeStructuredInsTransactions" name="PercentageOfPremiumsReceivableRelatedToNonInvestmentGradeStructuredInsTransactions" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="ambc_PercentageOfPremiumsReceivableRelatedToNonInvestmentGradeStudentLoanTransactions" name="PercentageOfPremiumsReceivableRelatedToNonInvestmentGradeStudentLoanTransactions" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="ambc_PercentageOfPremiumsReceivableRelatedToStudentLoanTransactions" name="PercentageOfPremiumsReceivableRelatedToStudentLoanTransactions" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="ambc_PercentagePremiumsReceivableRelatedToAssetBackedTransactions" name="PercentagePremiumsReceivableRelatedToAssetBackedTransactions" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="ambc_PercentagePremiumsReceivableRelatedToTransactionsWithNonInvestmentGradeInternalRatings" name="PercentagePremiumsReceivableRelatedToTransactionsWithNonInvestmentGradeInternalRatings" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="ambc_PercentageofPremiumsReceivableRelatedToNonInvestmentGradeLeaseSecuritizations" name="PercentageofPremiumsReceivableRelatedToNonInvestmentGradeLeaseSecuritizations" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_PostDeterminationMember" name="PostDeterminationMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="ambc_PremiumsPastDueOnNonInvestmentGradeObligation" name="PremiumsPastDueOnNonInvestmentGradeObligation" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_PresentValueofExpectedNetCashFlowsClaimsandLossExpensesMember" name="PresentValueofExpectedNetCashFlowsClaimsandLossExpensesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_PresentValueofExpectedNetCashFlowsRecoveriesMember" name="PresentValueofExpectedNetCashFlowsRecoveriesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="ambc_ProceedsFromTheSaleOfJuniorSurplusNotes" name="ProceedsFromTheSaleOfJuniorSurplusNotes" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="ambc_ProceedsReceivedfromaSecuredBorrowing" name="ProceedsReceivedfromaSecuredBorrowing" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_ProvisionforIncomeTaxesLineItems" name="ProvisionforIncomeTaxesLineItems" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_ProvisionforIncomeTaxesTable" name="ProvisionforIncomeTaxesTable" nillable="true" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_RandomSamplesMember" name="RandomSamplesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_RatingMember" name="RatingMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_RealizedGainsOrLossesAndOtherSettlementsOnCreditDerivativeContractsMember" name="RealizedGainsOrLossesAndOtherSettlementsOnCreditDerivativeContractsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_ReconciliationofEffectiveTaxRatesLineItems" name="ReconciliationofEffectiveTaxRatesLineItems" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_ReconciliationofEffectiveTaxRatesTable" name="ReconciliationofEffectiveTaxRatesTable" nillable="true" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_ReconciliationofUnrecognizedTaxBenefitsLineItems" name="ReconciliationofUnrecognizedTaxBenefitsLineItems" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_ReconciliationofUnrecognizedTaxBenefitsTable" name="ReconciliationofUnrecognizedTaxBenefitsTable" nillable="true" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_ReorganizationAbstract" name="ReorganizationAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="ambc_RestrictedCashAndCashEquivalentsFairValueDisclosure" name="RestrictedCashAndCashEquivalentsFairValueDisclosure" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="ambc_SalesInformationLineItems" name="SalesInformationLineItems" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_ScheduleOfBalanceOfRmbsSubrogationRecoveriesAndRelatedClaimLiabilitiesByEstimationApproachLineItems" name="ScheduleOfBalanceOfRmbsSubrogationRecoveriesAndRelatedClaimLiabilitiesByEstimationApproachLineItems" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_ScheduleOfBalanceOfSubrogationRecoveriesAndRelatedClaimLiabilitiesByEstimationApproachTable" name="ScheduleOfBalanceOfSubrogationRecoveriesAndRelatedClaimLiabilitiesByEstimationApproachTable" nillable="true" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_ScheduleOfEarningsPerShareLineItems" name="ScheduleOfEarningsPerShareLineItems" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_ScheduleOfEarningsPerShareTable" name="ScheduleOfEarningsPerShareTable" nillable="true" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_ScheduleOfFiniteLivedIntangibleAssetsAmortizationExpenseTable" name="ScheduleOfFiniteLivedIntangibleAssetsAmortizationExpenseTable" nillable="true" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="ambc_ScheduleOfIncomeTaxesChargedCreditedDirectlyToEquityTableTextBlock" name="ScheduleOfIncomeTaxesChargedCreditedDirectlyToEquityTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="ambc_ScheduleOfInformationByMajorCategoryOfCreditDerivativesContractsTableTextBlock" name="ScheduleOfInformationByMajorCategoryOfCreditDerivativesContractsTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="ambc_ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationDiscountOnGrossClaimLiability" name="ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationDiscountOnGrossClaimLiability" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="ambc_ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationGrossUndiscountedClaimLiability" name="ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationGrossUndiscountedClaimLiability" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="ambc_ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationLossAdjustmentExpensesReserve" name="ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationLossAdjustmentExpensesReserve" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="ambc_ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossClaimLiabilityDiscountOnOtherSubrogation" name="ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossClaimLiabilityDiscountOnOtherSubrogation" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="ambc_ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossClaimLiabilityDiscountOnRmbsSubrogation" name="ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossClaimLiabilityDiscountOnRmbsSubrogation" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="ambc_ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossClaimLiabilityOtherSubrogation" name="ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossClaimLiabilityOtherSubrogation" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="ambc_ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossClaimLiabilityRmbsSubrogation" name="ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossClaimLiabilityRmbsSubrogation" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="ambc_ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossUndiscountedClaimLiabilityGrossUndiscountedOtherSubrogation" name="ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossUndiscountedClaimLiabilityGrossUndiscountedOtherSubrogation" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="ambc_ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossUndiscountedClaimLiabilityGrossUndiscountedRmbsSubrogation" name="ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossUndiscountedClaimLiabilityGrossUndiscountedRmbsSubrogation" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="ambc_ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationRmbsGrossClaimLiabilitiesAfterSubrogationRecoveries" name="ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationRmbsGrossClaimLiabilitiesAfterSubrogationRecoveries" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="ambc_ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationRmbsGrossClaimLiabilitiesBeforeSubrogationRecoveries" name="ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationRmbsGrossClaimLiabilitiesBeforeSubrogationRecoveries" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="ambc_ScheduleOfLoansAndAllowanceForLoanByClassIndividuallyAndCollectivelyEvaluatedForImpairmentLineItems" name="ScheduleOfLoansAndAllowanceForLoanByClassIndividuallyAndCollectivelyEvaluatedForImpairmentLineItems" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="ambc_ScheduleOfReinsuranceOnPremiumsWrittenAndEarnedTableTextBlock" name="ScheduleOfReinsuranceOnPremiumsWrittenAndEarnedTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="ambc_ScheduleOfReinsuranceRecoverableAndProvisionByCategoryOfReinsurerTableTextBlock" name="ScheduleOfReinsuranceRecoverableAndProvisionByCategoryOfReinsurerTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_ScheduleofDeferredIncomeTaxAssetsandLiabilitiesLineItems" name="ScheduleofDeferredIncomeTaxAssetsandLiabilitiesLineItems" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_ScheduleofDeferredIncomeTaxAssetsandLiabilitiesTable" name="ScheduleofDeferredIncomeTaxAssetsandLiabilitiesTable" nillable="true" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="ambc_ScheduleofLossAndLossExpenseReservesAndSubrogationRecoverableTableTableTextBlock" name="ScheduleofLossAndLossExpenseReservesAndSubrogationRecoverableTableTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="ambc_ScheduleofNetOperatingLossAndTaxCreditCarryoversTableTextBlock" name="ScheduleofNetOperatingLossAndTaxCreditCarryoversTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="ambc_SecuritiesIssuedbyDelawareTrust" name="SecuritiesIssuedbyDelawareTrust" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_SegregatedAccountMember" name="SegregatedAccountMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_SponsoredVariableInterestEntitiesMember" name="SponsoredVariableInterestEntitiesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_SubrogationByEstimationApproachRollForward" name="SubrogationByEstimationApproachRollForward" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="ambc_SummaryOfBalanceOfRmbsSubrogationRecoveriesAndRelatedClaimLiabilitiesByEstimationApproachTableTextBlock" name="SummaryOfBalanceOfRmbsSubrogationRecoveriesAndRelatedClaimLiabilitiesByEstimationApproachTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="ambc_SummaryOfBalanceOfRmbsSubrogationRecoveriesByEstimationApproachTableTextBlock" name="SummaryOfBalanceOfRmbsSubrogationRecoveriesByEstimationApproachTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_SummaryOfCededParAndNetUnsecuredReinsuranceRecoverableLineItems" name="SummaryOfCededParAndNetUnsecuredReinsuranceRecoverableLineItems" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_SummaryOfCededParAndNetUnsecuredReinsuranceRecoverableTable" name="SummaryOfCededParAndNetUnsecuredReinsuranceRecoverableTable" nillable="true" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="ambc_SummaryOfFairValueOfFixedIncomeSecuritiesByAssetTypeHeldByConsolidatedVariableInterestEntitiesTableTextBlock" name="SummaryOfFairValueOfFixedIncomeSecuritiesByAssetTypeHeldByConsolidatedVariableInterestEntitiesTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_SummaryOfInformationByMajorCategoryOfCreditDerivativesContractsAbstract" name="SummaryOfInformationByMajorCategoryOfCreditDerivativesContractsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_SummaryOfRollforwardOfSubrogationByEstimationApproachLineItems" name="SummaryOfRollforwardOfSubrogationByEstimationApproachLineItems" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_SummaryOfRollforwardOfSubrogationByEstimationApproachTable" name="SummaryOfRollforwardOfSubrogationByEstimationApproachTable" nillable="true" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="ambc_SummaryOfSourcesOfCollateralReceivedHeldAndWayOfPledgingCollateralTableTextBlock" name="SummaryOfSourcesOfCollateralReceivedHeldAndWayOfPledgingCollateralTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="ambc_SupplementalInformationAboutLoansHeldAsAssetsAndLongTermDebtAssociatedWithVariableInterestEntitiesTableTextBlock" name="SupplementalInformationAboutLoansHeldAsAssetsAndLongTermDebtAssociatedWithVariableInterestEntitiesTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_SurplusNotesMember" name="SurplusNotesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_SurveillanceCategoryFiveMember" name="SurveillanceCategoryFiveMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_SurveillanceCategoryFourMember" name="SurveillanceCategoryFourMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_SurveillanceCategoryOneSurveyListMember" name="SurveillanceCategoryOneSurveyListMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_SurveillanceCategoryOneaMember" name="SurveillanceCategoryOneaMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_SurveillanceCategoryThreeMember" name="SurveillanceCategoryThreeMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_SurveillanceCategoryTwoMember" name="SurveillanceCategoryTwoMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="ambc_TierABCCredit" name="TierABCCredit" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="ambc_TierACreditUsage" name="TierACreditUsage" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_TierAMember" name="TierAMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_TierBMember" name="TierBMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_TierCMember" name="TierCMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_TierDMember" name="TierDMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="ambc_TollingPaymentPayabletoAFG" name="TollingPaymentPayabletoAFG" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="ambc_TotalPooledInvestmentMember" name="TotalPooledInvestmentMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_UnaffiliatedCustomersMember" name="UnaffiliatedCustomersMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_UnearnedPremiumReserveMember" name="UnearnedPremiumReserveMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_UnitedStatesTransactionsMember" name="UnitedStatesTransactionsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_UnpaidClaimsAccruedInterestMember" name="UnpaidClaimsAccruedInterestMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_UnpaidClaimsClaimsMember" name="UnpaidClaimsClaimsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_UnrealizedGainsOrLossesOnCreditDerivativeContractsMember" name="UnrealizedGainsOrLossesOnCreditDerivativeContractsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="ambc_UnrecognizedTaxBenefitsInterestOnIncomeTaxesPaid" name="UnrecognizedTaxBenefitsInterestOnIncomeTaxesPaid" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="ambc_ValuationAllowancesAndReservesChargedToEquity" name="ValuationAllowancesAndReservesChargedToEquity" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_VariableInterestEntityClassificationOfCarryingAmountAssetsAbstract" name="VariableInterestEntityClassificationOfCarryingAmountAssetsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_VariableInterestEntityConsolidatedCarryingAmountLiabilitiesAbstract" name="VariableInterestEntityConsolidatedCarryingAmountLiabilitiesAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ambc_VariableInterestEntityMember" name="VariableInterestEntityMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="ambc_VariableInterestEntityNonconsolidatedCarryingAmountDerivativeNetAssetsOrLiabilities" name="VariableInterestEntityNonconsolidatedCarryingAmountDerivativeNetAssetsOrLiabilities" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="ambc_VariableInterestEntityNonconsolidatedCarryingAmountInsuranceAssets" name="VariableInterestEntityNonconsolidatedCarryingAmountInsuranceAssets" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="ambc_VariableInterestEntityNonconsolidatedCarryingAmountInsuranceLiabilities" name="VariableInterestEntityNonconsolidatedCarryingAmountInsuranceLiabilities" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="ambc_VariableInterestEntityNotPrimaryBeneficiaryTableTextBlock" name="VariableInterestEntityNotPrimaryBeneficiaryTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="ambc_Variableinterestentitiesdeconsolidationgainloss" name="Variableinterestentitiesdeconsolidationgainloss" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="ambc_WarrantBuyBackAuthorizedDollars" name="WarrantBuyBackAuthorizedDollars" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="ambc_WarrantExercisedDuringPeriodShares" name="WarrantExercisedDuringPeriodShares" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
  <xsd:element id="ambc_WarrantsOutstanding" name="WarrantsOutstanding" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="instant" />
  <xsd:element id="ambc_WarrantsPurchasedDuringPeriodDollars" name="WarrantsPurchasedDuringPeriodDollars" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="ambc_WarrantsPurchasedDuringPeriodShares" name="WarrantsPurchasedDuringPeriodShares" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
  <xsd:element id="ambc_WeightedAverageLifeOfAssetsHeldBySponsoredSpecialPurposeEntities" name="WeightedAverageLifeOfAssetsHeldBySponsoredSpecialPurposeEntities" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element id="ambc_WeightedAverageRatingOfAssetsHeldBySponsoredSpecialPurposeEntities" name="WeightedAverageRatingOfAssetsHeldBySponsoredSpecialPurposeEntities" nillable="true" substitutionGroup="xbrli:item" type="us-types:durationStringItemType" xbrli:periodType="duration" />
</xsd:schema>
