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Condensed Statements of Cash Flows (Parenthetical) - USD ($)
Sep. 30, 2019
Sep. 30, 2018
Components of Cash and Cash Equivalents:    
Cash and Cash Equivalents $ 1,325,617,585 $ 1,488,417,608
Equity in Trading Accounts:    
Cash and Cash Equivalents 169,419,628 135,097,595
Total Cash, Cash Equivalents and Equity in Trading Accounts $ 1,495,037,213 $ 1,623,515,203