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Condensed Statements of Cash Flows - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash Flows from Operating Activities:
Net income (loss)	$ (1,617,373,490)	$ 420,897,668
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Unrealized (gain) loss on open futures contracts	931,028,767	(277,413,658)
(Increase) decrease in dividends receivable	(234,188)	(364,025)
(Increase) decrease in interest receivable	14,782	26,712
(Increase) decrease in prepaid insurance	(116,702)	31,698
(Increase) decrease in prepaid registration fees	(851,162)	127,886
(Increase) decrease in ETF transaction fees receivable	0	2,000
Increase (decrease) in payable due to Broker	(8,820,649)	61,251,648
Increase (decrease) in General Partner management fees payable	161,415	(127,867)
Increase (decrease) in professional fees payable	(672,203)	(807,493)
Increase (decrease) in brokerage commissions payable	(30,000)	0
Increase (decrease) in directors' fees payable	2,971	2,322
Increase (decrease) in insurance payable	0	458
Increase (decrease) in license fees payable	6,658	(2,249)
Net cash provided by (used in) operating activities	(696,883,801)	203,625,100
Cash Flows from Financing Activities:
Addition of partnership shares	3,194,923,364	691,606,693
Redemption of partnership shares	(689,284,444)	(1,019,626,617)
Net cash provided by (used in) financing activities	2,505,638,920	(328,019,924)
Net Increase (Decrease) in Cash and Cash Equivalents	1,808,755,119	(124,394,824)
Total Cash, Cash Equivalents and Equity in Trading Accounts, beginning of year	1,176,245,411	1,656,935,976
Total Cash, Cash Equivalents and Equity in Trading Accounts, end of year	$ 2,985,000,530	$ 1,532,541,152

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