000091376009-302021FYFalseus-gaap:AccountingStandardsUpdate201802Memberus-gaap:AccountingStandardsUpdate201613Member00009137602020-10-012021-03-31xbrli:shares00009137602021-05-06iso4217:USD00009137602021-03-3100009137602020-09-30iso4217:USDxbrli:shares00009137602021-01-012021-03-3100009137602020-01-012020-03-3100009137602019-10-012020-03-3100009137602019-09-3000009137602020-03-310000913760us-gaap:CommonStockMember2019-12-310000913760us-gaap:TreasuryStockMember2019-12-310000913760us-gaap:AdditionalPaidInCapitalMember2019-12-310000913760us-gaap:RetainedEarningsMember2019-12-310000913760us-gaap:AccumulatedOtherComprehensiveIncomeMember2019-12-3100009137602019-12-310000913760us-gaap:RetainedEarningsMember2020-01-012020-03-310000913760us-gaap:AccumulatedOtherComprehensiveIncomeMember2020-01-012020-03-310000913760us-gaap:AdditionalPaidInCapitalMember2020-01-012020-03-310000913760us-gaap:TreasuryStockMember2020-01-012020-03-310000913760us-gaap:CommonStockMember2020-03-310000913760us-gaap:TreasuryStockMember2020-03-310000913760us-gaap:AdditionalPaidInCapitalMember2020-03-310000913760us-gaap:RetainedEarningsMember2020-03-310000913760us-gaap:AccumulatedOtherComprehensiveIncomeMember2020-03-310000913760us-gaap:CommonStockMember2020-12-310000913760us-gaap:TreasuryStockMember2020-12-310000913760us-gaap:AdditionalPaidInCapitalMember2020-12-310000913760us-gaap:RetainedEarningsMember2020-12-310000913760us-gaap:AccumulatedOtherComprehensiveIncomeMember2020-12-3100009137602020-12-310000913760us-gaap:RetainedEarningsMember2021-01-012021-03-310000913760us-gaap:AccumulatedOtherComprehensiveIncomeMember2021-01-012021-03-310000913760us-gaap:AdditionalPaidInCapitalMember2021-01-012021-03-310000913760us-gaap:CommonStockMember2021-03-310000913760us-gaap:TreasuryStockMember2021-03-310000913760us-gaap:AdditionalPaidInCapitalMember2021-03-310000913760us-gaap:RetainedEarningsMember2021-03-310000913760us-gaap:AccumulatedOtherComprehensiveIncomeMember2021-03-310000913760us-gaap:CommonStockMember2019-09-300000913760us-gaap:TreasuryStockMember2019-09-300000913760us-gaap:AdditionalPaidInCapitalMember2019-09-300000913760us-gaap:RetainedEarningsMember2019-09-300000913760us-gaap:AccumulatedOtherComprehensiveIncomeMember2019-09-3000009137602018-10-012019-09-300000913760srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:RetainedEarningsMember2019-09-300000913760srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:AccumulatedOtherComprehensiveIncomeMember2019-09-300000913760srt:CumulativeEffectPeriodOfAdoptionAdjustmentMember2019-09-300000913760srt:CumulativeEffectPeriodOfAdoptionAdjustedBalanceMemberus-gaap:CommonStockMember2019-09-300000913760us-gaap:TreasuryStockMembersrt:CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember2019-09-300000913760srt:CumulativeEffectPeriodOfAdoptionAdjustedBalanceMemberus-gaap:AdditionalPaidInCapitalMember2019-09-300000913760us-gaap:RetainedEarningsMembersrt:CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember2019-09-300000913760us-gaap:AccumulatedOtherComprehensiveIncomeMembersrt:CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember2019-09-300000913760srt:CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember2019-09-300000913760us-gaap:RetainedEarningsMember2019-10-012020-03-310000913760us-gaap:AccumulatedOtherComprehensiveIncomeMember2019-10-012020-03-310000913760us-gaap:AdditionalPaidInCapitalMember2019-10-012020-03-310000913760us-gaap:TreasuryStockMember2019-10-012020-03-310000913760us-gaap:CommonStockMember2020-09-300000913760us-gaap:TreasuryStockMember2020-09-300000913760us-gaap:AdditionalPaidInCapitalMember2020-09-300000913760us-gaap:RetainedEarningsMember2020-09-300000913760us-gaap:AccumulatedOtherComprehensiveIncomeMember2020-09-3000009137602019-10-012020-09-300000913760srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:RetainedEarningsMember2020-09-300000913760srt:CumulativeEffectPeriodOfAdoptionAdjustmentMember2020-09-300000913760srt:CumulativeEffectPeriodOfAdoptionAdjustedBalanceMemberus-gaap:CommonStockMember2020-09-300000913760us-gaap:TreasuryStockMembersrt:CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember2020-09-300000913760srt:CumulativeEffectPeriodOfAdoptionAdjustedBalanceMemberus-gaap:AdditionalPaidInCapitalMember2020-09-300000913760us-gaap:RetainedEarningsMembersrt:CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember2020-09-300000913760us-gaap:AccumulatedOtherComprehensiveIncomeMembersrt:CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember2020-09-300000913760srt:CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember2020-09-300000913760us-gaap:RetainedEarningsMember2020-10-012021-03-310000913760us-gaap:AccumulatedOtherComprehensiveIncomeMember2020-10-012021-03-310000913760us-gaap:AdditionalPaidInCapitalMember2020-10-012021-03-31intl:clientintl:country0000913760intl:RetailSegmentMember2021-03-310000913760srt:CumulativeEffectPeriodOfAdoptionAdjustmentMember2020-10-010000913760srt:CumulativeEffectPeriodOfAdoptionAdjustmentMember2020-10-012020-10-010000913760intl:ContingentConsiderationMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2021-03-310000913760intl:ContingentConsiderationMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2020-09-300000913760us-gaap:CertificatesOfDepositMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2021-03-310000913760us-gaap:CertificatesOfDepositMemberus-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2021-03-310000913760us-gaap:CertificatesOfDepositMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2021-03-310000913760us-gaap:CertificatesOfDepositMemberus-gaap:FairValueMeasurementsRecurringMemberintl:CounterpartyAndCashCollateralNettingAdjustmentMember2021-03-310000913760us-gaap:CertificatesOfDepositMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310000913760us-gaap:MoneyMarketFundsMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2021-03-310000913760us-gaap:FairValueInputsLevel2Memberus-gaap:MoneyMarketFundsMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310000913760us-gaap:MoneyMarketFundsMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2021-03-310000913760us-gaap:MoneyMarketFundsMemberus-gaap:FairValueMeasurementsRecurringMemberintl:CounterpartyAndCashCollateralNettingAdjustmentMember2021-03-310000913760us-gaap:MoneyMarketFundsMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310000913760us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2021-03-310000913760us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2021-03-310000913760us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2021-03-310000913760us-gaap:FairValueMeasurementsRecurringMemberintl:CounterpartyAndCashCollateralNettingAdjustmentMember2021-03-310000913760us-gaap:FairValueMeasurementsRecurringMember2021-03-310000913760intl:CommoditiesWarehouseReceiptsMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2021-03-310000913760us-gaap:FairValueInputsLevel2Memberintl:CommoditiesWarehouseReceiptsMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310000913760intl:CommoditiesWarehouseReceiptsMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2021-03-310000913760intl:CommoditiesWarehouseReceiptsMemberus-gaap:FairValueMeasurementsRecurringMemberintl:CounterpartyAndCashCollateralNettingAdjustmentMember2021-03-310000913760intl:CommoditiesWarehouseReceiptsMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310000913760us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Memberus-gaap:USGovernmentDebtSecuritiesMember2021-03-310000913760us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:USGovernmentDebtSecuritiesMember2021-03-310000913760us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Memberus-gaap:USGovernmentDebtSecuritiesMember2021-03-310000913760us-gaap:FairValueMeasurementsRecurringMemberintl:CounterpartyAndCashCollateralNettingAdjustmentMemberus-gaap:USGovernmentDebtSecuritiesMember2021-03-310000913760us-gaap:FairValueMeasurementsRecurringMemberus-gaap:USGovernmentDebtSecuritiesMember2021-03-310000913760us-gaap:USGovernmentDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2021-03-310000913760us-gaap:FairValueInputsLevel2Memberus-gaap:USGovernmentDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310000913760us-gaap:USGovernmentDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2021-03-310000913760us-gaap:USGovernmentDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberintl:CounterpartyAndCashCollateralNettingAdjustmentMember2021-03-310000913760us-gaap:USGovernmentDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310000913760intl:TBAAndForwardSettlingSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2021-03-310000913760us-gaap:FairValueInputsLevel2Memberintl:TBAAndForwardSettlingSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310000913760intl:TBAAndForwardSettlingSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2021-03-310000913760intl:TBAAndForwardSettlingSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberintl:CounterpartyAndCashCollateralNettingAdjustmentMember2021-03-310000913760intl:TBAAndForwardSettlingSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310000913760us-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2021-03-310000913760us-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2021-03-310000913760us-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2021-03-310000913760us-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberintl:CounterpartyAndCashCollateralNettingAdjustmentMember2021-03-310000913760us-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310000913760us-gaap:DerivativeMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2021-03-310000913760us-gaap:FairValueInputsLevel2Memberus-gaap:DerivativeMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310000913760us-gaap:DerivativeMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2021-03-310000913760us-gaap:DerivativeMemberus-gaap:FairValueMeasurementsRecurringMemberintl:CounterpartyAndCashCollateralNettingAdjustmentMember2021-03-310000913760us-gaap:DerivativeMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310000913760us-gaap:EquitySecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2021-03-310000913760us-gaap:FairValueInputsLevel2Memberus-gaap:EquitySecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310000913760us-gaap:EquitySecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2021-03-310000913760us-gaap:EquitySecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberintl:CounterpartyAndCashCollateralNettingAdjustmentMember2021-03-310000913760us-gaap:EquitySecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310000913760us-gaap:FairValueMeasurementsRecurringMemberus-gaap:DebtSecuritiesMemberus-gaap:FairValueInputsLevel1Member2021-03-310000913760us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:DebtSecuritiesMember2021-03-310000913760us-gaap:FairValueMeasurementsRecurringMemberus-gaap:DebtSecuritiesMemberus-gaap:FairValueInputsLevel3Member2021-03-310000913760us-gaap:FairValueMeasurementsRecurringMemberus-gaap:DebtSecuritiesMemberintl:CounterpartyAndCashCollateralNettingAdjustmentMember2021-03-310000913760us-gaap:FairValueMeasurementsRecurringMemberus-gaap:DebtSecuritiesMember2021-03-310000913760us-gaap:USGovernmentDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2021-03-310000913760us-gaap:FairValueInputsLevel2Memberus-gaap:USGovernmentDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310000913760us-gaap:USGovernmentDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2021-03-310000913760us-gaap:USGovernmentDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberintl:CounterpartyAndCashCollateralNettingAdjustmentMember2021-03-310000913760us-gaap:USGovernmentDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310000913760us-gaap:USGovernmentAgenciesDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2021-03-310000913760us-gaap:USGovernmentAgenciesDebtSecuritiesMemberus-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2021-03-310000913760us-gaap:USGovernmentAgenciesDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2021-03-310000913760us-gaap:USGovernmentAgenciesDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberintl:CounterpartyAndCashCollateralNettingAdjustmentMember2021-03-310000913760us-gaap:USGovernmentAgenciesDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310000913760us-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2021-03-310000913760us-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2021-03-310000913760us-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2021-03-310000913760us-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberintl:CounterpartyAndCashCollateralNettingAdjustmentMember2021-03-310000913760us-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310000913760us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Memberus-gaap:MortgageBackedSecuritiesMember2021-03-310000913760us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MortgageBackedSecuritiesMember2021-03-310000913760us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MortgageBackedSecuritiesMember2021-03-310000913760us-gaap:FairValueMeasurementsRecurringMemberintl:CounterpartyAndCashCollateralNettingAdjustmentMemberus-gaap:MortgageBackedSecuritiesMember2021-03-310000913760us-gaap:FairValueMeasurementsRecurringMemberus-gaap:MortgageBackedSecuritiesMember2021-03-310000913760us-gaap:AssetBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2021-03-310000913760us-gaap:FairValueInputsLevel2Memberus-gaap:AssetBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310000913760us-gaap:AssetBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2021-03-310000913760us-gaap:AssetBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberintl:CounterpartyAndCashCollateralNettingAdjustmentMember2021-03-310000913760us-gaap:AssetBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310000913760us-gaap:DerivativeMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2021-03-310000913760us-gaap:FairValueInputsLevel2Memberus-gaap:DerivativeMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310000913760us-gaap:DerivativeMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2021-03-310000913760us-gaap:DerivativeMemberus-gaap:FairValueMeasurementsRecurringMemberintl:CounterpartyAndCashCollateralNettingAdjustmentMember2021-03-310000913760us-gaap:DerivativeMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310000913760intl:CommoditiesLeasesAndUnpricedPositionsMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2021-03-310000913760us-gaap:FairValueInputsLevel2Memberintl:CommoditiesLeasesAndUnpricedPositionsMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310000913760intl:CommoditiesLeasesAndUnpricedPositionsMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2021-03-310000913760intl:CommoditiesLeasesAndUnpricedPositionsMemberus-gaap:FairValueMeasurementsRecurringMemberintl:CounterpartyAndCashCollateralNettingAdjustmentMember2021-03-310000913760intl:CommoditiesLeasesAndUnpricedPositionsMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310000913760intl:CommoditiesWarehouseReceiptsMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2021-03-310000913760us-gaap:FairValueInputsLevel2Memberintl:CommoditiesWarehouseReceiptsMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310000913760intl:CommoditiesWarehouseReceiptsMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2021-03-310000913760intl:CommoditiesWarehouseReceiptsMemberus-gaap:FairValueMeasurementsRecurringMemberintl:CounterpartyAndCashCollateralNettingAdjustmentMember2021-03-310000913760intl:CommoditiesWarehouseReceiptsMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310000913760intl:ExchangeFirmCommonStockMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2021-03-310000913760us-gaap:FairValueInputsLevel2Memberintl:ExchangeFirmCommonStockMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310000913760intl:ExchangeFirmCommonStockMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2021-03-310000913760intl:ExchangeFirmCommonStockMemberus-gaap:FairValueMeasurementsRecurringMemberintl:CounterpartyAndCashCollateralNettingAdjustmentMember2021-03-310000913760intl:ExchangeFirmCommonStockMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310000913760intl:MutualFundsAndOtherMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2021-03-310000913760us-gaap:FairValueInputsLevel2Memberintl:MutualFundsAndOtherMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310000913760intl:MutualFundsAndOtherMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2021-03-310000913760intl:MutualFundsAndOtherMemberus-gaap:FairValueMeasurementsRecurringMemberintl:CounterpartyAndCashCollateralNettingAdjustmentMember2021-03-310000913760intl:MutualFundsAndOtherMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310000913760intl:PhysicalCommoditiesInventoryPreciousMetalsMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2021-03-310000913760us-gaap:FairValueInputsLevel2Memberintl:PhysicalCommoditiesInventoryPreciousMetalsMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310000913760intl:PhysicalCommoditiesInventoryPreciousMetalsMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2021-03-310000913760intl:PhysicalCommoditiesInventoryPreciousMetalsMemberus-gaap:FairValueMeasurementsRecurringMemberintl:CounterpartyAndCashCollateralNettingAdjustmentMember2021-03-310000913760intl:PhysicalCommoditiesInventoryPreciousMetalsMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310000913760intl:ContingentConsiderationMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2021-03-310000913760us-gaap:FairValueInputsLevel2Memberintl:ContingentConsiderationMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310000913760intl:ContingentConsiderationMemberus-gaap:FairValueMeasurementsRecurringMemberintl:CounterpartyAndCashCollateralNettingAdjustmentMember2021-03-310000913760intl:ContingentConsiderationMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310000913760us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Memberintl:TBAAndForwardSettlingSecuritiesMember2021-03-310000913760us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberintl:TBAAndForwardSettlingSecuritiesMember2021-03-310000913760us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Memberintl:TBAAndForwardSettlingSecuritiesMember2021-03-310000913760us-gaap:FairValueMeasurementsRecurringMemberintl:CounterpartyAndCashCollateralNettingAdjustmentMemberintl:TBAAndForwardSettlingSecuritiesMember2021-03-310000913760us-gaap:FairValueMeasurementsRecurringMemberintl:TBAAndForwardSettlingSecuritiesMember2021-03-310000913760us-gaap:DerivativeMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2021-03-310000913760us-gaap:DerivativeMemberus-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2021-03-310000913760us-gaap:DerivativeMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2021-03-310000913760us-gaap:DerivativeMemberus-gaap:FairValueMeasurementsRecurringMemberintl:CounterpartyAndCashCollateralNettingAdjustmentMember2021-03-310000913760us-gaap:DerivativeMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310000913760us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Memberintl:PayablesToBrokerDealersClearingOrganizationsAndCounterpartiesMember2021-03-310000913760us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberintl:PayablesToBrokerDealersClearingOrganizationsAndCounterpartiesMember2021-03-310000913760us-gaap:FairValueMeasurementsRecurringMemberintl:PayablesToBrokerDealersClearingOrganizationsAndCounterpartiesMemberus-gaap:FairValueInputsLevel3Member2021-03-310000913760us-gaap:FairValueMeasurementsRecurringMemberintl:CounterpartyAndCashCollateralNettingAdjustmentMemberintl:PayablesToBrokerDealersClearingOrganizationsAndCounterpartiesMember2021-03-310000913760us-gaap:FairValueMeasurementsRecurringMemberintl:PayablesToBrokerDealersClearingOrganizationsAndCounterpartiesMember2021-03-310000913760us-gaap:CertificatesOfDepositMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2020-09-300000913760us-gaap:CertificatesOfDepositMemberus-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2020-09-300000913760us-gaap:CertificatesOfDepositMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2020-09-300000913760us-gaap:CertificatesOfDepositMemberus-gaap:FairValueMeasurementsRecurringMemberintl:CounterpartyAndCashCollateralNettingAdjustmentMember2020-09-300000913760us-gaap:CertificatesOfDepositMemberus-gaap:FairValueMeasurementsRecurringMember2020-09-300000913760us-gaap:MoneyMarketFundsMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2020-09-300000913760us-gaap:FairValueInputsLevel2Memberus-gaap:MoneyMarketFundsMemberus-gaap:FairValueMeasurementsRecurringMember2020-09-300000913760us-gaap:MoneyMarketFundsMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2020-09-300000913760us-gaap:MoneyMarketFundsMemberus-gaap:FairValueMeasurementsRecurringMemberintl:CounterpartyAndCashCollateralNettingAdjustmentMember2020-09-300000913760us-gaap:MoneyMarketFundsMemberus-gaap:FairValueMeasurementsRecurringMember2020-09-300000913760us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2020-09-300000913760us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2020-09-300000913760us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2020-09-300000913760us-gaap:FairValueMeasurementsRecurringMemberintl:CounterpartyAndCashCollateralNettingAdjustmentMember2020-09-300000913760us-gaap:FairValueMeasurementsRecurringMember2020-09-300000913760intl:CommoditiesWarehouseReceiptsMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2020-09-300000913760us-gaap:FairValueInputsLevel2Memberintl:CommoditiesWarehouseReceiptsMemberus-gaap:FairValueMeasurementsRecurringMember2020-09-300000913760intl:CommoditiesWarehouseReceiptsMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2020-09-300000913760intl:CommoditiesWarehouseReceiptsMemberus-gaap:FairValueMeasurementsRecurringMemberintl:CounterpartyAndCashCollateralNettingAdjustmentMember2020-09-300000913760intl:CommoditiesWarehouseReceiptsMemberus-gaap:FairValueMeasurementsRecurringMember2020-09-300000913760us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Memberus-gaap:USGovernmentDebtSecuritiesMember2020-09-300000913760us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:USGovernmentDebtSecuritiesMember2020-09-300000913760us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Memberus-gaap:USGovernmentDebtSecuritiesMember2020-09-300000913760us-gaap:FairValueMeasurementsRecurringMemberintl:CounterpartyAndCashCollateralNettingAdjustmentMemberus-gaap:USGovernmentDebtSecuritiesMember2020-09-300000913760us-gaap:FairValueMeasurementsRecurringMemberus-gaap:USGovernmentDebtSecuritiesMember2020-09-300000913760us-gaap:USGovernmentDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2020-09-300000913760us-gaap:FairValueInputsLevel2Memberus-gaap:USGovernmentDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2020-09-300000913760us-gaap:USGovernmentDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2020-09-300000913760us-gaap:USGovernmentDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberintl:CounterpartyAndCashCollateralNettingAdjustmentMember2020-09-300000913760us-gaap:USGovernmentDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2020-09-300000913760intl:TBAAndForwardSettlingSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2020-09-300000913760us-gaap:FairValueInputsLevel2Memberintl:TBAAndForwardSettlingSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2020-09-300000913760intl:TBAAndForwardSettlingSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2020-09-300000913760intl:TBAAndForwardSettlingSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberintl:CounterpartyAndCashCollateralNettingAdjustmentMember2020-09-300000913760intl:TBAAndForwardSettlingSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2020-09-300000913760us-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2020-09-300000913760us-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2020-09-300000913760us-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2020-09-300000913760us-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberintl:CounterpartyAndCashCollateralNettingAdjustmentMember2020-09-300000913760us-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2020-09-300000913760us-gaap:DerivativeMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2020-09-300000913760us-gaap:FairValueInputsLevel2Memberus-gaap:DerivativeMemberus-gaap:FairValueMeasurementsRecurringMember2020-09-300000913760us-gaap:DerivativeMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2020-09-300000913760us-gaap:DerivativeMemberus-gaap:FairValueMeasurementsRecurringMemberintl:CounterpartyAndCashCollateralNettingAdjustmentMember2020-09-300000913760us-gaap:DerivativeMemberus-gaap:FairValueMeasurementsRecurringMember2020-09-300000913760us-gaap:EquitySecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2020-09-300000913760us-gaap:FairValueInputsLevel2Memberus-gaap:EquitySecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2020-09-300000913760us-gaap:EquitySecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2020-09-300000913760us-gaap:EquitySecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberintl:CounterpartyAndCashCollateralNettingAdjustmentMember2020-09-300000913760us-gaap:EquitySecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2020-09-300000913760us-gaap:FairValueMeasurementsRecurringMemberus-gaap:DebtSecuritiesMemberus-gaap:FairValueInputsLevel1Member2020-09-300000913760us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:DebtSecuritiesMember2020-09-300000913760us-gaap:FairValueMeasurementsRecurringMemberus-gaap:DebtSecuritiesMemberus-gaap:FairValueInputsLevel3Member2020-09-300000913760us-gaap:FairValueMeasurementsRecurringMemberus-gaap:DebtSecuritiesMemberintl:CounterpartyAndCashCollateralNettingAdjustmentMember2020-09-300000913760us-gaap:FairValueMeasurementsRecurringMemberus-gaap:DebtSecuritiesMember2020-09-300000913760us-gaap:USGovernmentDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2020-09-300000913760us-gaap:FairValueInputsLevel2Memberus-gaap:USGovernmentDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2020-09-300000913760us-gaap:USGovernmentDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2020-09-300000913760us-gaap:USGovernmentDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberintl:CounterpartyAndCashCollateralNettingAdjustmentMember2020-09-300000913760us-gaap:USGovernmentDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2020-09-300000913760us-gaap:USGovernmentAgenciesDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2020-09-300000913760us-gaap:USGovernmentAgenciesDebtSecuritiesMemberus-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2020-09-300000913760us-gaap:USGovernmentAgenciesDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2020-09-300000913760us-gaap:USGovernmentAgenciesDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberintl:CounterpartyAndCashCollateralNettingAdjustmentMember2020-09-300000913760us-gaap:USGovernmentAgenciesDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2020-09-300000913760us-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2020-09-300000913760us-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2020-09-300000913760us-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2020-09-300000913760us-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberintl:CounterpartyAndCashCollateralNettingAdjustmentMember2020-09-300000913760us-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2020-09-300000913760us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Memberus-gaap:MortgageBackedSecuritiesMember2020-09-300000913760us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MortgageBackedSecuritiesMember2020-09-300000913760us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MortgageBackedSecuritiesMember2020-09-300000913760us-gaap:FairValueMeasurementsRecurringMemberintl:CounterpartyAndCashCollateralNettingAdjustmentMemberus-gaap:MortgageBackedSecuritiesMember2020-09-300000913760us-gaap:FairValueMeasurementsRecurringMemberus-gaap:MortgageBackedSecuritiesMember2020-09-300000913760us-gaap:AssetBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2020-09-300000913760us-gaap:FairValueInputsLevel2Memberus-gaap:AssetBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2020-09-300000913760us-gaap:AssetBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2020-09-300000913760us-gaap:AssetBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberintl:CounterpartyAndCashCollateralNettingAdjustmentMember2020-09-300000913760us-gaap:AssetBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2020-09-300000913760us-gaap:DerivativeMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2020-09-300000913760us-gaap:FairValueInputsLevel2Memberus-gaap:DerivativeMemberus-gaap:FairValueMeasurementsRecurringMember2020-09-300000913760us-gaap:DerivativeMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2020-09-300000913760us-gaap:DerivativeMemberus-gaap:FairValueMeasurementsRecurringMemberintl:CounterpartyAndCashCollateralNettingAdjustmentMember2020-09-300000913760us-gaap:DerivativeMemberus-gaap:FairValueMeasurementsRecurringMember2020-09-300000913760intl:CommoditiesLeasesAndUnpricedPositionsMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2020-09-300000913760us-gaap:FairValueInputsLevel2Memberintl:CommoditiesLeasesAndUnpricedPositionsMemberus-gaap:FairValueMeasurementsRecurringMember2020-09-300000913760intl:CommoditiesLeasesAndUnpricedPositionsMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2020-09-300000913760intl:CommoditiesLeasesAndUnpricedPositionsMemberus-gaap:FairValueMeasurementsRecurringMemberintl:CounterpartyAndCashCollateralNettingAdjustmentMember2020-09-300000913760intl:CommoditiesLeasesAndUnpricedPositionsMemberus-gaap:FairValueMeasurementsRecurringMember2020-09-300000913760intl:CommoditiesWarehouseReceiptsMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2020-09-300000913760us-gaap:FairValueInputsLevel2Memberintl:CommoditiesWarehouseReceiptsMemberus-gaap:FairValueMeasurementsRecurringMember2020-09-300000913760intl:CommoditiesWarehouseReceiptsMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2020-09-300000913760intl:CommoditiesWarehouseReceiptsMemberus-gaap:FairValueMeasurementsRecurringMemberintl:CounterpartyAndCashCollateralNettingAdjustmentMember2020-09-300000913760intl:CommoditiesWarehouseReceiptsMemberus-gaap:FairValueMeasurementsRecurringMember2020-09-300000913760intl:ExchangeFirmCommonStockMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2020-09-300000913760us-gaap:FairValueInputsLevel2Memberintl:ExchangeFirmCommonStockMemberus-gaap:FairValueMeasurementsRecurringMember2020-09-300000913760intl:ExchangeFirmCommonStockMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2020-09-300000913760intl:ExchangeFirmCommonStockMemberus-gaap:FairValueMeasurementsRecurringMemberintl:CounterpartyAndCashCollateralNettingAdjustmentMember2020-09-300000913760intl:ExchangeFirmCommonStockMemberus-gaap:FairValueMeasurementsRecurringMember2020-09-300000913760intl:MutualFundsAndOtherMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2020-09-300000913760us-gaap:FairValueInputsLevel2Memberintl:MutualFundsAndOtherMemberus-gaap:FairValueMeasurementsRecurringMember2020-09-300000913760intl:MutualFundsAndOtherMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2020-09-300000913760intl:MutualFundsAndOtherMemberus-gaap:FairValueMeasurementsRecurringMemberintl:CounterpartyAndCashCollateralNettingAdjustmentMember2020-09-300000913760intl:MutualFundsAndOtherMemberus-gaap:FairValueMeasurementsRecurringMember2020-09-300000913760intl:PhysicalCommoditiesInventoryPreciousMetalsMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2020-09-300000913760us-gaap:FairValueInputsLevel2Memberintl:PhysicalCommoditiesInventoryPreciousMetalsMemberus-gaap:FairValueMeasurementsRecurringMember2020-09-300000913760intl:PhysicalCommoditiesInventoryPreciousMetalsMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2020-09-300000913760intl:PhysicalCommoditiesInventoryPreciousMetalsMemberus-gaap:FairValueMeasurementsRecurringMemberintl:CounterpartyAndCashCollateralNettingAdjustmentMember2020-09-300000913760intl:PhysicalCommoditiesInventoryPreciousMetalsMemberus-gaap:FairValueMeasurementsRecurringMember2020-09-300000913760intl:ContingentConsiderationMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2020-09-300000913760us-gaap:FairValueInputsLevel2Memberintl:ContingentConsiderationMemberus-gaap:FairValueMeasurementsRecurringMember2020-09-300000913760intl:ContingentConsiderationMemberus-gaap:FairValueMeasurementsRecurringMemberintl:CounterpartyAndCashCollateralNettingAdjustmentMember2020-09-300000913760intl:ContingentConsiderationMemberus-gaap:FairValueMeasurementsRecurringMember2020-09-300000913760us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Memberintl:TBAAndForwardSettlingSecuritiesMember2020-09-300000913760us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberintl:TBAAndForwardSettlingSecuritiesMember2020-09-300000913760us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Memberintl:TBAAndForwardSettlingSecuritiesMember2020-09-300000913760us-gaap:FairValueMeasurementsRecurringMemberintl:CounterpartyAndCashCollateralNettingAdjustmentMemberintl:TBAAndForwardSettlingSecuritiesMember2020-09-300000913760us-gaap:FairValueMeasurementsRecurringMemberintl:TBAAndForwardSettlingSecuritiesMember2020-09-300000913760us-gaap:DerivativeMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2020-09-300000913760us-gaap:DerivativeMemberus-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2020-09-300000913760us-gaap:DerivativeMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2020-09-300000913760us-gaap:DerivativeMemberus-gaap:FairValueMeasurementsRecurringMemberintl:CounterpartyAndCashCollateralNettingAdjustmentMember2020-09-300000913760us-gaap:DerivativeMemberus-gaap:FairValueMeasurementsRecurringMember2020-09-300000913760us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Memberintl:PayablesToBrokerDealersClearingOrganizationsAndCounterpartiesMember2020-09-300000913760us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberintl:PayablesToBrokerDealersClearingOrganizationsAndCounterpartiesMember2020-09-300000913760us-gaap:FairValueMeasurementsRecurringMemberintl:PayablesToBrokerDealersClearingOrganizationsAndCounterpartiesMemberus-gaap:FairValueInputsLevel3Member2020-09-300000913760us-gaap:FairValueMeasurementsRecurringMemberintl:CounterpartyAndCashCollateralNettingAdjustmentMemberintl:PayablesToBrokerDealersClearingOrganizationsAndCounterpartiesMember2020-09-300000913760us-gaap:FairValueMeasurementsRecurringMemberintl:PayablesToBrokerDealersClearingOrganizationsAndCounterpartiesMember2020-09-300000913760intl:StoneXIncBankOfAmericaSyndicatedCreditFacilityMember2021-03-31xbrli:pure0000913760intl:SeniorNotesDueTwentyTwentyFiveMember2021-03-310000913760us-gaap:FairValueInputsLevel2Member2021-03-310000913760intl:ExchangeTradedCommodityContractsMember2021-03-310000913760intl:ExchangeTradedCommodityContractsMember2020-09-300000913760intl:OverCounterOtcCommodityContractsMember2021-03-310000913760intl:OverCounterOtcCommodityContractsMember2020-09-300000913760us-gaap:ForeignExchangeForwardMember2021-03-310000913760us-gaap:ForeignExchangeForwardMember2020-09-300000913760intl:OverCounterOtcForeignExchangeContractsMember2021-03-310000913760intl:OverCounterOtcForeignExchangeContractsMember2020-09-300000913760intl:ExchangeTradedInterestRateContractsMember2021-03-310000913760intl:ExchangeTradedInterestRateContractsMember2020-09-300000913760us-gaap:InterestRateContractMember2021-03-310000913760us-gaap:InterestRateContractMember2020-09-300000913760us-gaap:EquityContractMember2021-03-310000913760us-gaap:EquityContractMember2020-09-300000913760intl:OTCEquityAndIndicesContractMember2021-03-310000913760intl:OTCEquityAndIndicesContractMember2020-09-300000913760intl:TBAAndForwardSettlingSecuritiesMember2021-03-310000913760intl:TBAAndForwardSettlingSecuritiesMember2020-09-300000913760intl:DepositsAndReceivablesFromExchangeClearingOrganizationsMember2021-03-310000913760intl:DepositsAndReceivablesFromExchangeClearingOrganizationsMember2020-09-300000913760intl:ReceivableFromClientsNetMember2021-03-310000913760intl:ReceivableFromClientsNetMember2020-09-300000913760intl:FinancialInstrumentsOwnedMember2021-03-310000913760intl:FinancialInstrumentsOwnedMember2020-09-300000913760intl:PayablesToClientsMember2021-03-310000913760intl:PayablesToClientsMember2020-09-300000913760intl:PayablesToBrokerDealersClearingOrganizationsAndCounterpartiesMember2021-03-310000913760intl:PayablesToBrokerDealersClearingOrganizationsAndCounterpartiesMember2020-09-300000913760intl:FinancialInstrumentSoldNotYetPurchasedMember2021-03-310000913760intl:FinancialInstrumentSoldNotYetPurchasedMember2020-09-30intl:contract0000913760intl:TBASecuritiesPurchasedUnrealizedGainMemberintl:DepositsAndReceivablesFromBrokerDealersClearingOrganizationsAndCounterpartiesMember2021-03-310000913760intl:TBASecuritiesPurchasedUnrealizedGainMemberintl:DepositsAndReceivablesFromBrokerDealersClearingOrganizationsAndCounterpartiesMember2020-09-300000913760intl:TBASecuritiesPurchasedUnrealizedLossMemberintl:DepositsAndReceivablesFromBrokerDealersClearingOrganizationsAndCounterpartiesMember2021-03-310000913760intl:TBASecuritiesPurchasedUnrealizedLossMemberintl:DepositsAndReceivablesFromBrokerDealersClearingOrganizationsAndCounterpartiesMember2020-09-300000913760intl:TBASecuritiesPurchasedUnrealizedGainMemberintl:PayablesToBrokerDealersClearingOrganizationsAndCounterpartiesMember2021-03-310000913760intl:TBASecuritiesPurchasedUnrealizedGainMemberintl:PayablesToBrokerDealersClearingOrganizationsAndCounterpartiesMember2020-09-300000913760intl:TBASecuritiesPurchasedUnrealizedLossMemberintl:PayablesToBrokerDealersClearingOrganizationsAndCounterpartiesMember2021-03-310000913760intl:TBASecuritiesPurchasedUnrealizedLossMemberintl:PayablesToBrokerDealersClearingOrganizationsAndCounterpartiesMember2020-09-300000913760intl:TBASecuritiesSoldUnrealizedGainMemberintl:DepositsAndReceivablesFromBrokerDealersClearingOrganizationsAndCounterpartiesMember2021-03-310000913760intl:TBASecuritiesSoldUnrealizedGainMemberintl:DepositsAndReceivablesFromBrokerDealersClearingOrganizationsAndCounterpartiesMember2020-09-300000913760intl:DepositsAndReceivablesFromBrokerDealersClearingOrganizationsAndCounterpartiesMemberintl:TBASecuritiesSoldUnrealizedLossMember2021-03-310000913760intl:DepositsAndReceivablesFromBrokerDealersClearingOrganizationsAndCounterpartiesMemberintl:TBASecuritiesSoldUnrealizedLossMember2020-09-300000913760intl:TBASecuritiesSoldUnrealizedGainMemberintl:PayablesToBrokerDealersClearingOrganizationsAndCounterpartiesMember2021-03-310000913760intl:TBASecuritiesSoldUnrealizedGainMemberintl:PayablesToBrokerDealersClearingOrganizationsAndCounterpartiesMember2020-09-300000913760intl:PayablesToBrokerDealersClearingOrganizationsAndCounterpartiesMemberintl:TBASecuritiesSoldUnrealizedLossMember2021-03-310000913760intl:PayablesToBrokerDealersClearingOrganizationsAndCounterpartiesMemberintl:TBASecuritiesSoldUnrealizedLossMember2020-09-300000913760intl:ForwardSettlingSecuritiesSoldUnrealizedGainMemberintl:DepositsAndReceivablesFromBrokerDealersClearingOrganizationsAndCounterpartiesMember2021-03-310000913760intl:ForwardSettlingSecuritiesSoldUnrealizedGainMemberintl:DepositsAndReceivablesFromBrokerDealersClearingOrganizationsAndCounterpartiesMember2020-09-300000913760intl:ForwardSettlingSecuritiesPurchasedUnrealizedLossMemberintl:DepositsAndReceivablesFromBrokerDealersClearingOrganizationsAndCounterpartiesMember2021-03-310000913760intl:ForwardSettlingSecuritiesPurchasedUnrealizedLossMemberintl:DepositsAndReceivablesFromBrokerDealersClearingOrganizationsAndCounterpartiesMember2020-09-300000913760us-gaap:CommodityContractMember2021-01-012021-03-310000913760us-gaap:CommodityContractMember2020-01-012020-03-310000913760us-gaap:CommodityContractMember2020-10-012021-03-310000913760us-gaap:CommodityContractMember2019-10-012020-03-310000913760us-gaap:ForeignExchangeForwardMember2021-01-012021-03-310000913760us-gaap:ForeignExchangeForwardMember2020-01-012020-03-310000913760us-gaap:ForeignExchangeForwardMember2020-10-012021-03-310000913760us-gaap:ForeignExchangeForwardMember2019-10-012020-03-310000913760us-gaap:InterestRateContractMember2021-01-012021-03-310000913760us-gaap:InterestRateContractMember2020-01-012020-03-310000913760us-gaap:InterestRateContractMember2020-10-012021-03-310000913760us-gaap:InterestRateContractMember2019-10-012020-03-310000913760intl:TBAAndForwardSettlingSecuritiesMember2021-01-012021-03-310000913760intl:TBAAndForwardSettlingSecuritiesMember2020-01-012020-03-310000913760intl:TBAAndForwardSettlingSecuritiesMember2020-10-012021-03-310000913760intl:TBAAndForwardSettlingSecuritiesMember2019-10-012020-03-310000913760us-gaap:DerivativeMember2021-01-012021-03-310000913760us-gaap:DerivativeMember2020-01-012020-03-310000913760us-gaap:DerivativeMember2020-10-012021-03-310000913760us-gaap:DerivativeMember2019-10-012020-03-310000913760intl:PhysicalCommoditiesInventoryPreciousMetalsMember2021-03-310000913760intl:PhysicalCommoditiesInventoryPreciousMetalsMember2020-09-300000913760intl:PreciousMetalsTradingMember2021-03-310000913760intl:PreciousMetalsTradingMember2020-09-300000913760intl:CommercialSegmentMember2021-03-310000913760intl:CommercialSegmentMember2020-09-300000913760intl:InstitutionalSegmentMember2021-03-310000913760intl:InstitutionalSegmentMember2020-09-300000913760intl:RetailSegmentMember2020-09-300000913760intl:GlobalPaymentsSegmentMember2021-03-310000913760intl:GlobalPaymentsSegmentMember2020-09-300000913760us-gaap:TradeNamesMember2021-03-310000913760us-gaap:TradeNamesMember2020-09-300000913760us-gaap:ComputerSoftwareIntangibleAssetMember2021-03-310000913760us-gaap:ComputerSoftwareIntangibleAssetMember2020-09-300000913760us-gaap:CustomerRelationshipsMember2021-03-310000913760us-gaap:CustomerRelationshipsMember2020-09-300000913760us-gaap:InternetDomainNamesMember2021-03-310000913760us-gaap:InternetDomainNamesMember2020-09-300000913760us-gaap:LicensingAgreementsMember2021-03-310000913760us-gaap:LicensingAgreementsMember2020-09-30intl:facility0000913760intl:FCSMarginLineOfCreditFacilityMember2021-03-310000913760intl:FMSSubNoteCommodityLineOfCreditFacilityMember2021-03-310000913760intl:StoneXLtdMember2021-03-310000913760intl:StoneXFinancialIncUncommittedCommoditiesDeliveryLineMember2021-03-310000913760intl:StoneXFinancialIncUncommittedCommoditiesDeliveryLineMember2020-03-310000913760intl:StoneXFinancialIncUncommittedCommoditiesDeliveryLineMember2020-09-300000913760intl:IFFIUncommittedLinesOfCreditMember2021-03-310000913760intl:IFFIUncommittedLinesOfCreditMember2020-09-300000913760intl:IFFIUncommittedLinesOfCreditMember2020-03-3100009137602020-06-110000913760intl:StoneXIncBankOfAmericaSyndicatedCreditFacilityMember2020-09-300000913760intl:FCSMarginLineOfCreditFacilityMember2020-09-300000913760intl:FMSSubNoteCommodityLineOfCreditFacilityMember2020-09-300000913760intl:StoneXLtdMember2020-09-300000913760intl:IFFIUncommittedLinesofCreditMemberMember2021-03-310000913760intl:IFFIUncommittedLinesofCreditMemberMember2020-09-300000913760intl:RabobankUncommitedLineOfCreditMember2021-03-310000913760intl:RabobankUncommitedLineOfCreditMember2020-09-300000913760intl:HCOSyndicatedLineOfCreditFacilityMember2021-03-310000913760us-gaap:SeniorNotesMember2021-03-310000913760us-gaap:RepurchaseAgreementsMember2021-03-310000913760us-gaap:RepurchaseAgreementsMember2020-09-300000913760us-gaap:MaturityOvernightAndOnDemandMember2021-03-310000913760us-gaap:MaturityUpTo30DaysMember2021-03-310000913760us-gaap:Maturity30To90DaysMember2021-03-310000913760us-gaap:MaturityOver90DaysMember2021-03-310000913760us-gaap:MaturityOvernightAndOnDemandMember2020-09-300000913760us-gaap:MaturityUpTo30DaysMember2020-09-300000913760us-gaap:Maturity30To90DaysMember2020-09-300000913760us-gaap:MaturityOver90DaysMember2020-09-300000913760us-gaap:USGovernmentDebtSecuritiesMember2021-03-310000913760us-gaap:USGovernmentDebtSecuritiesMember2020-09-300000913760us-gaap:USGovernmentAgenciesDebtSecuritiesMember2021-03-310000913760us-gaap:USGovernmentAgenciesDebtSecuritiesMember2020-09-300000913760us-gaap:AssetBackedSecuritiesMember2021-03-310000913760us-gaap:AssetBackedSecuritiesMember2020-09-300000913760us-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember2021-03-310000913760us-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember2020-09-300000913760us-gaap:CorporateBondSecuritiesMember2021-03-310000913760us-gaap:CorporateBondSecuritiesMember2020-09-300000913760us-gaap:EquitySecuritiesMember2021-03-310000913760us-gaap:EquitySecuritiesMember2020-09-30intl:account0000913760intl:StoneXFinancialMember2018-11-112018-11-160000913760us-gaap:AccumulatedTranslationAdjustmentMember2020-09-300000913760us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2020-09-300000913760us-gaap:AccumulatedTranslationAdjustmentMember2020-10-012021-03-310000913760us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2020-10-012021-03-310000913760us-gaap:AccumulatedTranslationAdjustmentMember2021-03-310000913760us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2021-03-310000913760intl:ExchangeTradedFuturesAndOptionsMember2021-01-012021-03-310000913760intl:ExchangeTradedFuturesAndOptionsMember2020-01-012020-03-310000913760intl:ExchangeTradedFuturesAndOptionsMember2020-10-012021-03-310000913760intl:ExchangeTradedFuturesAndOptionsMember2019-10-012020-03-310000913760intl:OTCDerivativeBrokerageMember2021-01-012021-03-310000913760intl:OTCDerivativeBrokerageMember2020-01-012020-03-310000913760intl:OTCDerivativeBrokerageMember2020-10-012021-03-310000913760intl:OTCDerivativeBrokerageMember2019-10-012020-03-310000913760intl:EquitiesandFixedIncomeCommissionsMember2021-01-012021-03-310000913760intl:EquitiesandFixedIncomeCommissionsMember2020-01-012020-03-310000913760intl:EquitiesandFixedIncomeCommissionsMember2020-10-012021-03-310000913760intl:EquitiesandFixedIncomeCommissionsMember2019-10-012020-03-310000913760intl:MutualFundSalesBasedCommissionsMember2021-01-012021-03-310000913760intl:MutualFundSalesBasedCommissionsMember2020-01-012020-03-310000913760intl:MutualFundSalesBasedCommissionsMember2020-10-012021-03-310000913760intl:MutualFundSalesBasedCommissionsMember2019-10-012020-03-310000913760us-gaap:VariableAnnuityMember2021-01-012021-03-310000913760us-gaap:VariableAnnuityMember2020-01-012020-03-310000913760us-gaap:VariableAnnuityMember2020-10-012021-03-310000913760us-gaap:VariableAnnuityMember2019-10-012020-03-310000913760intl:OtherSalesBasedCommissionsMember2021-01-012021-03-310000913760intl:OtherSalesBasedCommissionsMember2020-01-012020-03-310000913760intl:OtherSalesBasedCommissionsMember2020-10-012021-03-310000913760intl:OtherSalesBasedCommissionsMember2019-10-012020-03-310000913760intl:SalesBasedCommissionsMember2021-01-012021-03-310000913760intl:SalesBasedCommissionsMember2020-01-012020-03-310000913760intl:SalesBasedCommissionsMember2020-10-012021-03-310000913760intl:SalesBasedCommissionsMember2019-10-012020-03-310000913760intl:MutualFundTrailingCommissionsMember2021-01-012021-03-310000913760intl:MutualFundTrailingCommissionsMember2020-01-012020-03-310000913760intl:MutualFundTrailingCommissionsMember2020-10-012021-03-310000913760intl:MutualFundTrailingCommissionsMember2019-10-012020-03-310000913760intl:InsuranceAnnuityTrailingCommissionsMember2021-01-012021-03-310000913760intl:InsuranceAnnuityTrailingCommissionsMember2020-01-012020-03-310000913760intl:InsuranceAnnuityTrailingCommissionsMember2020-10-012021-03-310000913760intl:InsuranceAnnuityTrailingCommissionsMember2019-10-012020-03-310000913760intl:TrailingCommissionsMember2021-01-012021-03-310000913760intl:TrailingCommissionsMember2020-01-012020-03-310000913760intl:TrailingCommissionsMember2020-10-012021-03-310000913760intl:TrailingCommissionsMember2019-10-012020-03-310000913760us-gaap:ClearingServiceMember2021-01-012021-03-310000913760us-gaap:ClearingServiceMember2020-01-012020-03-310000913760us-gaap:ClearingServiceMember2020-10-012021-03-310000913760us-gaap:ClearingServiceMember2019-10-012020-03-310000913760intl:TradeConversionFeesMember2021-01-012021-03-310000913760intl:TradeConversionFeesMember2020-01-012020-03-310000913760intl:TradeConversionFeesMember2020-10-012021-03-310000913760intl:TradeConversionFeesMember2019-10-012020-03-310000913760intl:OtherCommissionAndClearingFeesMember2021-01-012021-03-310000913760intl:OtherCommissionAndClearingFeesMember2020-01-012020-03-310000913760intl:OtherCommissionAndClearingFeesMember2020-10-012021-03-310000913760intl:OtherCommissionAndClearingFeesMember2019-10-012020-03-310000913760intl:CommissionandClearingFeesMember2021-01-012021-03-310000913760intl:CommissionandClearingFeesMember2020-01-012020-03-310000913760intl:CommissionandClearingFeesMember2020-10-012021-03-310000913760intl:CommissionandClearingFeesMember2019-10-012020-03-310000913760intl:UnderwritingFeesMember2021-01-012021-03-310000913760intl:UnderwritingFeesMember2020-01-012020-03-310000913760intl:UnderwritingFeesMember2020-10-012021-03-310000913760intl:UnderwritingFeesMember2019-10-012020-03-310000913760us-gaap:AssetManagement1Member2021-01-012021-03-310000913760us-gaap:AssetManagement1Member2020-01-012020-03-310000913760us-gaap:AssetManagement1Member2020-10-012021-03-310000913760us-gaap:AssetManagement1Member2019-10-012020-03-310000913760intl:AdvisoryandConsultingFeesMember2021-01-012021-03-310000913760intl:AdvisoryandConsultingFeesMember2020-01-012020-03-310000913760intl:AdvisoryandConsultingFeesMember2020-10-012021-03-310000913760intl:AdvisoryandConsultingFeesMember2019-10-012020-03-310000913760intl:SweepProgramFeesMember2021-01-012021-03-310000913760intl:SweepProgramFeesMember2020-01-012020-03-310000913760intl:SweepProgramFeesMember2020-10-012021-03-310000913760intl:SweepProgramFeesMember2019-10-012020-03-310000913760intl:ClientAccountFeesMember2021-01-012021-03-310000913760intl:ClientAccountFeesMember2020-01-012020-03-310000913760intl:ClientAccountFeesMember2020-10-012021-03-310000913760intl:ClientAccountFeesMember2019-10-012020-03-310000913760intl:OtherConsultingManagementandAccountFeesMember2021-01-012021-03-310000913760intl:OtherConsultingManagementandAccountFeesMember2020-01-012020-03-310000913760intl:OtherConsultingManagementandAccountFeesMember2020-10-012021-03-310000913760intl:OtherConsultingManagementandAccountFeesMember2019-10-012020-03-310000913760intl:ConsultingManagementAndAccountFeesMember2021-01-012021-03-310000913760intl:ConsultingManagementAndAccountFeesMember2020-01-012020-03-310000913760intl:ConsultingManagementAndAccountFeesMember2020-10-012021-03-310000913760intl:ConsultingManagementAndAccountFeesMember2019-10-012020-03-310000913760us-gaap:TransferredAtPointInTimeMember2021-01-012021-03-310000913760us-gaap:TransferredAtPointInTimeMember2020-01-012020-03-310000913760us-gaap:TransferredAtPointInTimeMember2020-10-012021-03-310000913760us-gaap:TransferredAtPointInTimeMember2019-10-012020-03-310000913760us-gaap:TransferredOverTimeMember2021-01-012021-03-310000913760us-gaap:TransferredOverTimeMember2020-01-012020-03-310000913760us-gaap:TransferredOverTimeMember2020-10-012021-03-310000913760us-gaap:TransferredOverTimeMember2019-10-012020-03-310000913760intl:PreciousMetalsTradingMember2021-01-012021-03-310000913760intl:PreciousMetalsTradingMember2020-01-012020-03-310000913760intl:PreciousMetalsTradingMember2020-10-012021-03-310000913760intl:PreciousMetalsTradingMember2019-10-012020-03-310000913760intl:AgriculturalAndEnergyProductTradingMember2021-01-012021-03-310000913760intl:AgriculturalAndEnergyProductTradingMember2020-01-012020-03-310000913760intl:AgriculturalAndEnergyProductTradingMember2020-10-012021-03-310000913760intl:AgriculturalAndEnergyProductTradingMember2019-10-012020-03-310000913760country:US2021-01-012021-03-310000913760country:US2020-01-012020-03-310000913760country:US2020-10-012021-03-310000913760country:US2019-10-012020-03-310000913760srt:EuropeMember2021-01-012021-03-310000913760srt:EuropeMember2020-01-012020-03-310000913760srt:EuropeMember2020-10-012021-03-310000913760srt:EuropeMember2019-10-012020-03-310000913760srt:SouthAmericaMember2021-01-012021-03-310000913760srt:SouthAmericaMember2020-01-012020-03-310000913760srt:SouthAmericaMember2020-10-012021-03-310000913760srt:SouthAmericaMember2019-10-012020-03-310000913760intl:MiddleEastAndAsiaMember2021-01-012021-03-310000913760intl:MiddleEastAndAsiaMember2020-01-012020-03-310000913760intl:MiddleEastAndAsiaMember2020-10-012021-03-310000913760intl:MiddleEastAndAsiaMember2019-10-012020-03-310000913760intl:OtherGeographicLocationMember2021-01-012021-03-310000913760intl:OtherGeographicLocationMember2020-01-012020-03-310000913760intl:OtherGeographicLocationMember2020-10-012021-03-310000913760intl:OtherGeographicLocationMember2019-10-012020-03-310000913760intl:StoneXFinancialIncMember2021-03-310000913760intl:StoneXFinancialLtdMember2021-03-310000913760intl:GainCapitalGroupLLCMember2021-03-310000913760intl:GainCapitalUKLtdMember2021-03-31intl:employeeintl:marketintl:currency0000913760intl:GlobalPaymentsSegmentMember2020-10-012021-03-310000913760intl:CommercialSegmentMemberus-gaap:OperatingSegmentsMember2021-01-012021-03-310000913760intl:CommercialSegmentMemberus-gaap:OperatingSegmentsMember2020-01-012020-03-310000913760intl:CommercialSegmentMemberus-gaap:OperatingSegmentsMember2020-10-012021-03-310000913760intl:CommercialSegmentMemberus-gaap:OperatingSegmentsMember2019-10-012020-03-310000913760intl:InstitutionalSegmentMemberus-gaap:OperatingSegmentsMember2021-01-012021-03-310000913760intl:InstitutionalSegmentMemberus-gaap:OperatingSegmentsMember2020-01-012020-03-310000913760intl:InstitutionalSegmentMemberus-gaap:OperatingSegmentsMember2020-10-012021-03-310000913760intl:InstitutionalSegmentMemberus-gaap:OperatingSegmentsMember2019-10-012020-03-310000913760intl:RetailSegmentMemberus-gaap:OperatingSegmentsMember2021-01-012021-03-310000913760intl:RetailSegmentMemberus-gaap:OperatingSegmentsMember2020-01-012020-03-310000913760intl:RetailSegmentMemberus-gaap:OperatingSegmentsMember2020-10-012021-03-310000913760intl:RetailSegmentMemberus-gaap:OperatingSegmentsMember2019-10-012020-03-310000913760intl:GlobalPaymentsSegmentMemberus-gaap:OperatingSegmentsMember2021-01-012021-03-310000913760intl:GlobalPaymentsSegmentMemberus-gaap:OperatingSegmentsMember2020-01-012020-03-310000913760intl:GlobalPaymentsSegmentMemberus-gaap:OperatingSegmentsMember2020-10-012021-03-310000913760intl:GlobalPaymentsSegmentMemberus-gaap:OperatingSegmentsMember2019-10-012020-03-310000913760us-gaap:CorporateNonSegmentMember2021-01-012021-03-310000913760us-gaap:CorporateNonSegmentMember2020-01-012020-03-310000913760us-gaap:CorporateNonSegmentMember2020-10-012021-03-310000913760us-gaap:CorporateNonSegmentMember2019-10-012020-03-310000913760us-gaap:IntersegmentEliminationMember2021-01-012021-03-310000913760us-gaap:IntersegmentEliminationMember2020-01-012020-03-310000913760us-gaap:IntersegmentEliminationMember2020-10-012021-03-310000913760us-gaap:IntersegmentEliminationMember2019-10-012020-03-310000913760intl:CommercialSegmentMember2021-01-012021-03-310000913760intl:CommercialSegmentMember2020-01-012020-03-310000913760intl:CommercialSegmentMember2020-10-012021-03-310000913760intl:CommercialSegmentMember2019-10-012020-03-310000913760intl:InstitutionalSegmentMember2021-01-012021-03-310000913760intl:InstitutionalSegmentMember2020-01-012020-03-310000913760intl:InstitutionalSegmentMember2020-10-012021-03-310000913760intl:InstitutionalSegmentMember2019-10-012020-03-310000913760intl:RetailSegmentMember2021-01-012021-03-310000913760intl:RetailSegmentMember2020-01-012020-03-310000913760intl:RetailSegmentMember2020-10-012021-03-310000913760intl:RetailSegmentMember2019-10-012020-03-310000913760intl:GlobalPaymentsSegmentMember2021-01-012021-03-310000913760intl:GlobalPaymentsSegmentMember2020-01-012020-03-310000913760intl:GlobalPaymentsSegmentMember2019-10-012020-03-310000913760intl:CommercialSegmentMemberus-gaap:OperatingSegmentsMember2021-03-310000913760intl:CommercialSegmentMemberus-gaap:OperatingSegmentsMember2020-09-300000913760intl:InstitutionalSegmentMemberus-gaap:OperatingSegmentsMember2021-03-310000913760intl:InstitutionalSegmentMemberus-gaap:OperatingSegmentsMember2020-09-300000913760intl:RetailSegmentMemberus-gaap:OperatingSegmentsMember2021-03-310000913760intl:RetailSegmentMemberus-gaap:OperatingSegmentsMember2020-09-300000913760intl:GlobalPaymentsSegmentMemberus-gaap:OperatingSegmentsMember2021-03-310000913760intl:GlobalPaymentsSegmentMemberus-gaap:OperatingSegmentsMember2020-09-300000913760us-gaap:CorporateNonSegmentMember2021-03-310000913760us-gaap:CorporateNonSegmentMember2020-09-30
Table of Contents
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
____________________ 
FORM 10-Q
 ____________________
(Mark One)
☒QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the Quarterly Period Ended March 31, 2021
OR
☐TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the Transition Period From              to             
Commission File Number 000-23554
StoneX Group Inc.
(Exact name of registrant as specified in its charter)
Delaware 59-2921318
(State or other jurisdiction of
incorporation or organization)		 (I.R.S. Employer
Identification No.)
230 Park Ave, 10th Floor
New York, NY 10169
(Address of principal executive offices) (Zip Code)
(212) 485-3500
(Registrant’s telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act:
Title of Each ClassTrading SymbolName of each exchange on which registered
Common Stock, $0.01 par valueSNEXThe Nasdaq Stock Market LLC
Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  ☒ No  ☐
Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).    Yes  ☒ No ☐
Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer, ” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.
Large accelerated filero  Accelerated filerx
Non-accelerated fileroSmaller reporting company☐
Emerging growth company☐
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐
Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes  ☐ No ☒
As of May 6, 2021, there were 19,825,100 shares of the registrant’s common stock outstanding.

Table of Contents
StoneX Group Inc.
Quarterly Report on Form 10-Q for the Quarterly Period Ended March 31, 2021
Table of Contents
  Page
Part I. FINANCIAL INFORMATION
Item 1.
Item 2.
Item 3.
Item 4.
Part II. OTHER INFORMATION
Item 1.
Item 1A.
Item 2.
Item 6.


Table of Contents
PART I. FINANCIAL INFORMATION
Item 1. Financial Statements
StoneX Group Inc.
Condensed Consolidated Balance Sheets
(Unaudited)
(in millions, except par value and share amounts)March 31,
2021		September 30,
2020
ASSETS
Cash and cash equivalents$1,001.5 $952.6 
Cash, securities and other assets segregated under federal and other regulations (including $102.5 million and $2.6 million at fair value at March 31, 2021 and September 30, 2020, respectively)
2,102.9 1,920.2 
Collateralized transactions:
Securities purchased under agreements to resell2,297.2 1,696.2 
Securities borrowed1,735.3 1,440.0 
Deposits with and receivables from broker-dealers, clearing organizations and counterparties, net (including $839.8 million and $1,775.8 million at fair value at March 31, 2021 and September 30, 2020, respectively)
4,361.1 3,629.9 
Receivable from clients, net (including $1.0 million and $1.5 million at fair value at March 31, 2021 and September 30, 2020, respectively)
479.4 411.4 
Notes receivable, net6.7 1.7 
Income taxes receivable14.8 16.6 
Financial instruments owned, at fair value (includes securities pledged as collateral that can be sold or repledged of $564.7 million and $468.6 million at March 31, 2021 and September 30, 2020, respectively)
2,913.1 2,727.7 
Physical commodities inventory, net (including $355.2 million and $215.7 million at fair value at March 31, 2021 and September 30, 2020, respectively)
450.8 281.1 
Deferred income taxes, net35.2 36.9 
Property and equipment, net86.1 62.1 
Operating right of use assets97.1 101.5 
Goodwill and intangible assets, net102.5 109.5 
Other assets116.0 87.5 
Total assets$15,799.7 $13,474.9 
LIABILITIES AND STOCKHOLDERS' EQUITY
Liabilities:
Accounts payable and other accrued liabilities (including $1.5 million and $1.5 million at fair value at March 31, 2021 and September 30, 2020, respectively)
$281.8 $272.6 
Operating lease liabilities116.4 118.7 
Payables to:
Clients (including $(178.2) million and $(222.7) million at fair value at March 31, 2021 and September 30, 2020, respectively)
6,544.5 5,689.0 
Broker-dealers, clearing organizations and counterparties (including $43.7 million and $14.7 million at fair value at March 31, 2021 and September 30, 2020, respectively)
520.7 537.5 
Lenders under loans314.9 268.1 
Senior secured borrowings, net512.0 515.5 
Income taxes payable16.6 22.6 
Collateralized transactions:
Securities sold under agreements to repurchase3,767.2 3,155.5 
Securities loaned1,747.2 1,441.9 
Financial instruments sold, not yet purchased, at fair value1,118.2 686.0 
Total liabilities14,939.5 12,707.4 
Commitments and contingencies (Note 11)
Stockholders' equity:
Preferred stock, $0.01 par value. Authorized 1,000,000 shares; no shares issued or outstanding
— — 
Common stock, $0.01 par value. Authorized 30,000,000 shares; 22,205,997 issued and 19,784,040 outstanding at March 31, 2021 and 21,798,551 issued and 19,376,594 outstanding at September 30, 2020
0.2 0.2 
Common stock in treasury, at cost - 2,421,957 shares at March 31, 2021 and September 30, 2020, respectively
(57.6)(57.6)
Additional paid-in-capital304.4 292.6 
Retained earnings641.0 572.4 
Accumulated other comprehensive loss, net(27.8)(40.1)
Total equity860.2 767.5 
Total liabilities and stockholders' equity$15,799.7 $13,474.9 
See accompanying notes to the condensed consolidated financial statements.
1
Table of Contents
StoneX Group Inc.
Condensed Consolidated Income Statements
(Unaudited)
 Three Months Ended March 31,Six Months Ended March 31,
(in millions, except share and per share amounts)2021202020212020
Revenues:
Sales of physical commodities$10,804.3 $20,016.9 $19,687.8 $30,994.9 
Principal gains, net265.2 168.5 468.6 281.0 
Commission and clearing fees129.8 116.6 249.2 203.8 
Consulting, management, and account fees22.1 22.6 45.1 43.9 
Interest income23.4 41.7 44.6 87.7 
Total revenues11,244.8 20,366.3 20,495.3 31,611.3 
Cost of sales of physical commodities10,773.4 19,999.5 19,643.8 30,967.7 
Operating revenues471.4 366.8 851.5 643.6 
Transaction-based clearing expenses74.8 63.8 140.2 110.1 
Introducing broker commissions40.8 29.6 79.0 55.8 
Interest expense11.1 27.8 21.0 58.9 
Interest expense on corporate funding10.5 2.2 21.0 4.9 
Net operating revenues334.2 243.4 590.3 413.9 
Compensation and other expenses:
Compensation and benefits185.0 136.7 338.6 240.7 
Trading systems and market information14.8 11.2 28.5 21.6 
Professional fees9.0 4.7 18.3 10.7 
Non-trading technology and support10.6 5.9 21.5 11.9 
Occupancy and equipment rental7.5 4.9 16.1 9.9 
Selling and marketing6.5 4.2 15.3 5.6 
Travel and business development0.5 3.2 1.5 7.7 
Communications2.4 1.5 4.7 3.1 
Depreciation and amortization8.6 4.2 17.0 8.1 
Bad debts0.9 4.4 2.4 4.4 
Other12.1 6.4 23.2 12.5 
Total compensation and other expenses257.9 187.3 487.1 336.2 
Other gain— — — 0.1 
Income before tax76.3 56.1 103.2 77.8 
Income tax expense21.0 16.8 28.4 22.2 
Net income$55.3 $39.3 $74.8 $55.6 
Earnings per share:
Basic$2.81 $2.03 $3.81 $2.88 
Diluted$2.73 $2.00 $3.71 $2.84 
Weighted-average number of common shares outstanding:
Basic19,112,216 18,872,937 19,025,604 18,811,268 
Diluted19,670,539 19,189,953 19,570,028 19,132,497 
See accompanying notes to the condensed consolidated financial statements.
2
Table of Contents
StoneX Group Inc.
Condensed Consolidated Statements of Comprehensive Income
(Unaudited)
 Three Months Ended March 31,Six Months Ended March 31,
(in millions)2021202020212020
Net income$55.3 $39.3 $74.8 $55.6 
Other comprehensive (loss) income:
Foreign currency translation adjustment (1.6)(3.4)12.3 (2.7)
Other comprehensive (loss) income(1.6)(3.4)12.3 (2.7)
Comprehensive income$53.7 $35.9 $87.1 $52.9 
See accompanying notes to the condensed consolidated financial statements.
3
Table of Contents
StoneX Group Inc.
Condensed Consolidated Statements of Cash Flows
(Unaudited)
 Six Months Ended March 31,
(in millions)20212020
Cash flows from operating activities:
Net income$74.8 $55.6 
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization17.0 8.1 
Amortization of right of use assets4.8 3.9 
Bad debts2.4 4.4 
Deferred income taxes4.2 (1.0)
Amortization of debt issuance costs2.1 0.7 
Amortization of share-based compensation6.5 5.0 
Changes in operating assets and liabilities, net:
Securities and other assets segregated under federal and other regulations(89.6)297.9 
Securities purchased under agreements to resell(601.0)164.5 
Securities borrowed(295.3)359.4 
Deposits with and receivables from broker-dealers, clearing organizations, and counterparties, net(189.5)(52.2)
Receivables from clients, net(78.6)(63.2)
Notes receivable, net(5.0)(1.0)
Income taxes receivable1.3 8.7 
Financial instruments owned, at fair value(185.4)(350.5)
Physical commodities inventory, net(169.7)(25.9)
Other assets(22.5)— 
Accounts payable and other accrued liabilities10.0 30.2 
Operating lease liabilities(3.2)(4.0)
Payables to clients855.3 942.0 
Payables to broker-dealers, clearing organizations, and counterparties(16.8)163.0 
Income taxes payable(6.0)0.1 
Securities sold under agreements to repurchase611.7 26.6 
Securities loaned305.3 (391.1)
Financial instruments sold, not yet purchased, at fair value432.2 (11.2)
Net cash provided by operating activities665.0 1,170.0 
Cash flows from investing activities:
Cash paid for acquisitions, net(0.4)(7.8)
Purchase of property and equipment(40.0)(4.5)
Net cash used in investing activities(40.4)(12.3)
Cash flows from financing activities:
Net change in payables to lenders under loans with maturities 90 days or less42.8 111.6 
Proceeds from payables to lenders under loans with maturities greater than 90 days120.4 311.5 
Repayments of payables to lenders under loans with maturities greater than 90 days (125.4)(350.0)
Proceeds from issuance of senior secured term loan— 21.5 
Repayments of senior secured term loan(4.9)(4.9)
Issuance of note payable9.0 — 
Repayments of note payable— (0.4)
Deferred payments on acquisitions(0.8)(0.2)
Repurchase of common stock— (7.5)
Debt issuance costs— (1.5)
Exercise of stock options5.3 4.0 
Net cash provided by financing activities46.4 84.1 
Effect of exchange rates on cash, segregated cash, cash equivalents, and segregated cash equivalents12.7 (2.7)
Net increase in cash, segregated cash, cash equivalents, and segregated cash equivalents683.7 1,239.1 
Cash, segregated cash, cash equivalents, and segregated cash equivalents at beginning of period4,468.4 2,451.3 
Cash, segregated cash, cash equivalents, and segregated cash equivalents at end of period$5,152.1 $3,690.4 
Supplemental disclosure of cash flow information:
Cash paid for interest$32.9 $64.3 
Income taxes paid, net of cash refunds$28.2 $13.2 
Supplemental disclosure of non-cash investing and financing activities:
Identified intangible assets and goodwill on acquisitions$0.5 $7.2 
Acquisition of business:
Assets acquired$0.1 $352.6 
Liabilities assumed(0.2)(352.0)
Total net (liabilities)/assets assumed$(0.1)$0.6 
See accompanying notes to the condensed consolidated financial statements.
4
Table of Contents
StoneX Group Inc.
Condensed Consolidated Statements of Cash Flows - Continued
(Unaudited)

The following table provides a reconciliation of cash, segregated cash, cash equivalents, and segregated cash equivalents reported within the condensed consolidated balance sheets.
March 31,
(in millions)20212020
Cash and cash equivalents$1,001.5 $519.5 
Cash segregated under federal and other regulations(1)
2,000.3 1,168.0 
Cash segregated and deposited with or pledged to exchange-clearing organizations and other futures commission merchants (“FCMs”)(2)
2,050.3 1,896.7 
Securities segregated and pledged to exchange-clearing organizations(2)
100.0 106.2 
Total cash, segregated cash, cash equivalents, and segregated cash equivalents shown in the condensed consolidated statements of cash flows$5,152.1 $3,690.4 

(1) Represents segregated client cash and United States (“U.S.”) Treasury obligations held at third-party banks. Excludes segregated commodity warehouse receipts, segregated U.S. Treasury obligations with original or acquired maturities of greater than 90 days, and other assets of $102.6 million and $8.1 million as of March 31, 2021 and 2020, respectively, included within ‘Cash, securities and other assets segregated under federal and other regulations’ on the condensed consolidated balance sheets.

(2) Represents segregated client cash and U.S. Treasury obligations on deposit with, or pledged to, exchange clearing organizations and other FCMs. Excludes non-segregated cash, segregated U.S. Treasury obligations pledged to exchange-clearing organizations with original or acquired maturities greater than 90 days, and other assets of $2,210.9 million and $1,356.6 million as of March 31, 2021 and 2020, respectively, included within ‘Deposits with and receivables from broker-dealers, clearing organizations, and counterparties, net’ on the condensed consolidated balance sheets.

See accompanying notes to the condensed consolidated financial statements.

5
Table of Contents
StoneX Group Inc.
Condensed Consolidated Statements of Stockholders’ Equity
(Unaudited)
Three months ended March 31, 2020
(in millions)Common Stock Treasury Stock Additional Paid-in Capital Retained EarningsAccumulated Other Comprehensive Loss, netTotal
Balances as of December 31, 2019$0.2 $(50.5)$280.9 $419.1 $(34.8)$614.9 
Net income39.3 39.3 
Other comprehensive loss(3.4)(3.4)
Exercise of stock options2.5 2.5 
Share-based compensation2.4 2.4 
Repurchase of common stock (7.1)(7.1)
Balances as of March 31, 2020$0.2 $(57.6)$285.8 $458.4 $(38.2)$648.6 
Three months ended March 31, 2021
(in millions)Common Stock Treasury Stock Additional Paid-in Capital Retained EarningsAccumulated Other Comprehensive Loss, netTotal
Balances as of December 31, 2020$0.2 $(57.6)$297.4 $585.7 $(26.2)$799.5 
Net income55.3 55.3 
Other comprehensive loss(1.6)(1.6)
Exercise of stock options3.6 3.6 
Share-based compensation3.4 3.4 
Balances as of March 31, 2021$0.2 $(57.6)$304.4 $641.0 $(27.8)$860.2 
Six months ended March 31, 2020
(in millions)Common Stock Treasury Stock Additional Paid-in Capital Retained EarningsAccumulated Other Comprehensive Loss, netTotal
Balances as of September 30, 2019$0.2 $(50.1)$276.8 $402.1 $(34.8)$594.2 
ASU 2018-02 cumulative transition adjustment0.7 (0.7)— 
Adjusted Balances as of September 30, 20190.2 (50.1)276.8 402.8 (35.5)594.2 
Net income55.6 55.6 
Other comprehensive loss(2.7)(2.7)
Exercise of stock options4.0 4.0 
Share-based compensation5.0 5.0 
Repurchase of common stock(7.5)(7.5)
Balances as of March 31, 2020$0.2 $(57.6)$285.8 $458.4 $(38.2)$648.6 
Six months ended March 31, 2021
(in millions)Common Stock Treasury Stock Additional Paid-in Capital Retained EarningsAccumulated Other Comprehensive Loss, netTotal
Balances as of September 30, 2020$0.2 $(57.6)$292.6 $572.4 $(40.1)$767.5 
ASU 2016-13 cumulative transition adjustment(6.2)(6.2)
Adjusted Balances as of September 30, 20200.2 (57.6)292.6 566.2 (40.1)761.3 
Net income74.8 74.8 
Other comprehensive income12.3 12.3 
Exercise of stock options5.3 5.3 
Share-based compensation6.5 6.5 
Balances as of March 31, 2021$0.2 $(57.6)$304.4 $641.0 $(27.8)$860.2 
See accompanying notes to the condensed consolidated financial statements.
6
Table of Contents
StoneX Group Inc.
Notes to the Condensed Consolidated Financial Statements
(Unaudited)
Note 1 – Basis of Presentation and Consolidation and Accounting Standards Adopted
StoneX Group Inc., a Delaware corporation, and its consolidated subsidiaries (collectively “StoneX” or “the Company”), is a global financial services network that connects companies, organizations, traders and investors to the global market ecosystem through a unique blend of digital platforms, end-to-end clearing and execution services, high touch service, and deep expertise. The Company strives to be the one trusted partner to its clients, providing its network, product and services to allow them to pursue trading opportunities, manage their market risks, make investments and improve their business performance. The Company offers a vertically integrated product suite, beginning with high-touch and electronic access to nearly all major financial markets worldwide, as well as numerous liquidity venues. It delivers its services and access through the entire lifecycle of a trade, from deep market expertise and on-the-ground intelligence, to best execution and finally post-trade clearing, custody and settlement services. The Company has created a revenue stream that is diversified by asset class, client type and geography, including commissions and spreads as clients execute transactions across its financial network, non-trading client activity including interest and fee earnings on client balances, as well as fees for market intelligence and risk management services.
The Company provides its services to a diverse group of more than 35,000 commercial and institutional clients and over 340,000 retail clients, including commercial entities, asset managers, regional, national and introducing broker-dealers, insurance companies, brokers, institutional investors and professional traders, commercial and investment banks and government and non-governmental organizations (“NGOs”) located in more than 130 countries.
The Company’s common stock trades on The NASDAQ Global Select Market under the symbol “SNEX”.
Basis of Presentation and Consolidation
The accompanying unaudited condensed consolidated balance sheet as of September 30, 2020, which has been derived from the audited consolidated balance sheet of September 30, 2020, and the unaudited interim condensed consolidated financial statements have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”). Certain information and disclosures normally included in annual consolidated financial statements prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) have been condensed or omitted pursuant to those rules and regulations. The Company believes that the disclosures made are adequate to make the information presented not misleading. In the opinion of management, all adjustments (consisting of normal accruals) considered necessary for a fair presentation of the condensed consolidated financial statements for the interim periods presented have been reflected as required by Rule 10-01 of Regulation S-X.
Operating results for interim periods are not necessarily indicative of the results that may be expected for the full year. These interim condensed consolidated financial statements should be read in conjunction with the Company’s audited consolidated financial statements and related notes contained in the Company’s Annual Report on Form 10-K for the fiscal year ended September 30, 2020, as filed with the SEC.
These condensed consolidated financial statements include the accounts of StoneX Group Inc. and all entities in which the Company has a controlling financial interest. All material intercompany transactions and balances have been eliminated in consolidation.
The Company’s fiscal year end is September 30, and its fiscal quarters end on December 31, March 31, June 30 and September 30. Unless otherwise stated, all dates refer to fiscal years and fiscal interim periods.
Preparing condensed consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent liabilities as of the date of the condensed consolidated financial statements and the reported amounts of revenue and expenses during the reporting period. The most significant of these estimates and assumptions relate to fair value measurement for financial instruments and investments, revenue recognition, the provision for bad debts, valuation of inventories, valuation of goodwill and intangible assets, income taxes, and contingencies. Although these and other estimates and assumptions are based on the best available information, actual results could be materially different from these estimates. Estimates and assumptions were considered and made in context with the information reasonably available to the Company and the unknown future impacts of the novel coronavirus (“COVID-19”) as of March 31, 2021 and through the date of this Form 10-Q.
In the condensed consolidated income statements, the total revenues reported combine gross revenues for the physical commodities business and net revenues for all other businesses. The subtotal ‘operating revenues’ in the condensed consolidated income statements is calculated by deducting cost of sales of physical commodities from total revenues. The subtotal ‘net operating revenues’ in the condensed consolidated income statements is calculated as operating revenues less
7
Table of Contents
transaction-based clearing expenses, introducing broker commissions and interest expense. Transaction-based clearing expenses represent variable expenses paid to executing brokers, exchanges, clearing organizations and banks in relation to transactional volumes. Introducing broker commissions include commission paid to certain non-employee third parties that have introduced clients to the Company. Net operating revenues represent revenues available to pay variable compensation to risk management consultants and traders, direct non-variable expenses, as well as variable and non-variable expenses to operational and administrative employees.
Reclassifications
During the year ended September 30, 2020, the Company reclassified certain selling and marketing related costs in connection with the acquisition of Gain Capital Holdings, Inc. (“Gain”). In performing this reclassification, the Company has made retrospective adjustments to the condensed consolidated income statements for the three and six months ended March 31, 2020. For the three and six months ended March 31, 2020, selling and marketing related costs of $4.2 million and $5.6 million, respectively, were reclassified from ‘Other’ expense to ‘Selling and marketing’ expense.
Accounting Standards Adopted
In June 2016, the FASB issued ASU No. 2016-13, “Measurement of Credit Losses on Financial Instruments”, which significantly changes the ways entities recognize credit losses on financial instruments. The guidance is effective for public business entities for annual and interim periods in fiscal years beginning after December 15, 2019. In April 2019, the FASB issued ASU No. 2019-04, “Codification Improvements to Topic 326, Financial Instruments - Credit Losses, Topic 815, Derivatives and Hedging, and Topic 825, Financial Instruments”, which among other things, included several amendments to ASU No. 2016-13, changing how a company considers expected recoveries and contractual extensions or renewal options when estimating expected credit losses.
The guidance replaces the previous incurred loss impairment guidance and introduces a new credit reserving model known as the Current Expected Credit Loss (“CECL”) model, which is based on expected losses over the life of an asset, and applies to financial assets carried at amortized cost, held-to-maturity debt securities and off-balance sheet credit exposures. The allowance must reflect management’s estimate of credit losses over the life of the assets taking future economic changes into consideration.
The Company adopted this guidance on October 1, 2020, using the modified retrospective approach, which resulted in a recognized cumulative-effect adjustment of $6.2 million, net of tax of $2.0 million, to the opening balance of retained earnings - see notes 5 and 11. The adoption impact was attributable to an increase in allowance for credit losses on a group of approximately 300 client deficit accounts, originated in November 2018, of the FCM division of the Company’s wholly owned subsidiary, StoneX Financial Inc. Results for reporting periods beginning after October 1, 2020 are presented using the CECL model, while prior period amounts continue to be reported in accordance with previously applicable U.S. GAAP.
Current Expected Credit Losses
Beginning October 1, 2020, the Company estimates its allowance for credit losses on financial assets measured at amortized cost based on expected credit losses over the life of the financial asset. In determining expected credit losses, the Company considers a number of factors including, but not limited to, historical collection experience, current and forecasted economic and business conditions, internal and external credit risk ratings, collateral terms, payment terms and aging of the financial asset.
The Company estimates expected credit losses primarily using a probability of default (“PD”)/loss given default (“LGD”) model (“PD/LGD model”), under which the expected credit loss is calculated as the product of PD, LGD and exposure at default.
Additionally, for collateralized transactions, the Company elects to measure expected credit losses using the fair value of collateral received where the borrower is required to, and reasonably expected to, replenish the amount of collateral securing the receivable as a result of changes in the fair value of such collateral.
Note 2 – Earnings per Share
The Company presents basic and diluted earnings per share (“EPS”) using the two-class method, which requires all outstanding unvested share-based payment awards that contain rights to non-forfeitable dividends and therefore participate in undistributed earnings with common stockholders be included in computing earnings per share. Under the two-class method, net income is reduced by the amount of dividends declared in the period for each class of common stock and participating security. The remaining undistributed earnings are then allocated to common stock and participating securities, based on their respective rights to receive dividends. Restricted stock awards granted to certain employees and directors contain non-forfeitable rights to dividends at the same rate as common stock and are considered participating securities. Basic EPS has been computed by dividing net income by the weighted-average number of common shares outstanding.
8
Table of Contents
The following is a reconciliation of the numerator and denominator of the diluted earnings per share computations for the periods presented below.
 Three Months Ended March 31,Six Months Ended March 31,
(in millions, except share amounts)2021202020212020
Numerator:
Net income$55.3 $39.3 $74.8 $55.6 
Less: Allocation to participating securities(1.7)(0.9)(2.2)(1.2)
Net income allocated to common stockholders$53.6 $38.4 $72.6 $54.4