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Condensed Statements of Financial Condition (Parenthetical) - USD ($)
Sep. 30, 2020
Dec. 31, 2019
Sep. 30, 2019
Condensed Statements of Financial Condition      
Cash and Cash Equivalents $ 2,123,627,473 $ 1,026,973,397 $ 1,325,617,585
Equity in trading accounts:      
Cash and Cash Equivalents $ 1,863,442,283 $ 149,272,014 $ 169,419,628