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Statements of Cash Flows - USD ($)		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Cash Flows from Operating Activities:
Net income (loss)		$ 108,719,344	$ 14,434,325	$ (5,508,027)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Change in unrealized (gain) loss on open commodity futures contracts		(33,279,859)	(19,374,784)	26,844,760
(Increase) decrease in dividends receivable		12,772	(12,055)	15,874
(Increase) decrease in interest receivable		(655)	(5,156)	1,530
(Increase) decrease in prepaid insurance	[1]	(20)	(9)	(326)
(Increase) decrease in prepaid registration fees		(55,407)	0	0
Increase (decrease) in payable due to Broker		21,925,587	0	(7,565,281)
Increase (decrease) in General Partner management fees payable		74,050	461	(18,959)
Increase (decrease) in professional fees payable		13,106	(7,904)	(17,856)
Increase (decrease) in brokerage commissions payable		9,180	0	(3,940)
Increase (decrease) in directors' fees payable	[1]	854	150	(317)
Increase (decrease) in license fees payable		6,494	(862)	(1,572)
Net cash provided by (used in) operating activities		97,425,446	(4,965,834)	13,745,886
Cash Flows from Financing Activities:
Addition of partnership shares		302,421,810	2,254,827	0
Redemption of partnership shares		(268,903,063)	(12,410,743)	(35,247,245)
Net cash provided by (used in) financing activities		33,518,747	(10,155,916)	(35,247,245)
Net Increase (Decrease) in Cash and Cash Equivalents		130,944,193	(15,121,750)	(21,501,359)
Total Cash, Cash Equivalents and Equity in Trading Accounts, beginning of period		51,606,975	66,728,725	88,230,084
Total Cash, Cash Equivalents and Equity in Trading Accounts, end of period		$ 182,551,168	$ 51,606,975	$ 66,728,725
[1] Certain prior year amounts have been reclassified for consistency with the current presentation.

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