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Condensed Statements of Cash Flows - USD ($)		6 Months Ended
		Jun. 30, 2020	Jun. 30, 2019
Cash Flows from Operating Activities:
Net income (loss)		$ (205,605,648)	$ (41,285,033)
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		22,124,700	61,939,447
(Increase) decrease in dividends receivable		106,904	40,061
(Increase) decrease in interest receivable		5,227	9,670
(Increase) decrease in prepaid insurance	[1]	(33,652)	(16,493)
(Increase) decrease in prepaid registration fees		180,000	(496,097)
(Increase) decrease in ETF transaction fees receivable		1,000	1,000
Increase (decrease) in General Partner management fees payable		(13,928)	(39,220)
Increase (decrease) in professional fees payable		(381,269)	(393,667)
Increase (decrease) in brokerage commissions payable		105,456	0
Increase (decrease) in directors' fees payable	[1]	(7,046)	(398)
Increase (decrease) in license fees payable		7,905	(4,678)
Net cash provided by (used in) operating activities		(227,759,751)	(104,124,302)
Cash Flows from Financing Activities:
Addition of partnership shares		512,404,146	446,533,840
Redemption of partnership shares		(328,415,986)	(372,155,453)
Net cash provided by (used in) financing activities		183,988,160	74,378,387
Net Increase (Decrease) in Cash and Cash Equivalents		(43,771,591)	(29,745,915)
Total Cash, Cash Equivalents and Equity in Trading Accounts, beginning of period		458,998,451	359,791,174
Total Cash, Cash Equivalents and Equity in Trading Accounts, end of period		$ 415,226,860	$ 330,045,259
[1] Certain prior year amounts have been reclassified for consistency with the current presentation.

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