Statements of Financial Condition (Unaudited) (Parenthetical) - USD ($)	Sep. 30, 2022	Dec. 31, 2021
Investments in Securities, cost	$ 416,673,065	$ 429,717,441
US Treasury Bill Securities [Member]
Investments in Securities, cost	191,573,461	112,003,993
Affiliated Investments [Member]
Affiliated Investments, at Cost	$ 225,099,604	$ 317,713,448