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  <xs:element id="intl_AdjustmentToInvestmentInSubsRevenueForEquityMethodAccounting" abstract="false" name="AdjustmentToInvestmentInSubsRevenueForEquityMethodAccounting" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="intl_ReceivablesFromCustomersFairValueDisclosure" abstract="false" name="ReceivablesFromCustomersFairValueDisclosure" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="intl_TBASecuritiesSoldUnrealizedGainMember" abstract="true" name="TBASecuritiesSoldUnrealizedGainMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="intl_DepositsAndReceivablesFromExchangeClearingOrganizationsDomain" abstract="true" name="DepositsAndReceivablesFromExchangeClearingOrganizationsDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="intl_DeferredTaxAssetsNetofValuationAllowanceOperatingLossCarryforwardsStateandLocal" abstract="false" name="DeferredTaxAssetsNetofValuationAllowanceOperatingLossCarryforwardsStateandLocal" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="intl_RecoveryOfBadDebtOnPhysicalCoalAbstract" abstract="true" name="RecoveryOfBadDebtOnPhysicalCoalAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="intl_TermLoanPeriodicPrincipalPaymentPercentage" abstract="false" name="TermLoanPeriodicPrincipalPaymentPercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
</xs:schema>
