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Collateralized Transactions	9 Months Ended
	Sep. 30, 2021
Brokers and Dealers [Abstract]
Collateralized Transactions	Collateralized Transactions Repurchase Agreements Securities sold under Repurchase Agreements are accounted for as collateralized financing transactions and are recorded at the contractual amount for which the securities will be repurchased, including accrued interest. As of September 30, 2021, Cantor had $3.0 million of Repurchase Agreements between the Company and Cantor for the purpose of financing fails. As of December 31, 2020, Cantor did not have any Repurchase Agreements between the Company and Cantor for the purpose of financing fails.

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- Definition

The entire disclosure for repurchase agreements (also known as repos), resale agreements (also known as reverse repurchase agreements or reverse repos), securities borrowed transactions, and securities loaned transactions.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-URI http://asc.fasb.org/topic&trid=2197590

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