Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities:
Net Income (Loss)	$ (52,800,077)	$ (13,241,667)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Cost of securities purchased	(133,372,166)	(291,329,492)
Proceeds from securities sold and matured	137,000,000	336,945,573
Cost of affiliated investments purchased	(159,490,157)	(358,557,089)
Proceeds from affiliated investments sold	215,224,278	355,462,299
Net accretion of discount on United States Treasury Obligations	(624,438)	(2,204,900)
Net realized (gain) loss on United States Treasury Obligations and Affiliated Investments		1,430
Net change in unrealized (gain) loss on United States Treasury Obligations and Affiliated Investments	(758,162)	(51,086)
Change in operating assets and liabilities:
Variation margin - Commodity Futures Contracts	(861,158)	2,800,931
Dividends from affiliates	9,104	(9,912)
Management fees	(37,448)	(59,383)
Brokerage commissions and fees	1,472	78
Net cash provided by (used in) operating activities	4,291,248	29,756,782
Cash flows from financing activities:
Proceeds from purchases of Shares	34,463,738	16,951,145
Redemption of Shares	(38,916,870)	(43,494,213)
Increase (decrease) in payable for amount due to custodian		(3,213,714)
Net cash provided by (used in) financing activities	(4,453,132)	(29,756,782)
Net change in cash	(161,884)
Cash at beginning of period	161,884
Cash at end of period	0	0
Supplemental disclosure of cash flow information
Cash paid for interest	$ 3,966	$ 5,250