Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities:
Net Income (Loss)	$ (379,124,915)	$ 192,790,526
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Cost of securities purchased	(344,150,134)	(717,469,849)
Proceeds from securities sold and matured	506,996,264	893,450,782
Cost of affiliated investments purchased	(317,285,890)	(914,538,133)
Proceeds from affiliated investments sold	801,752,087	990,145,147
Net accretion of discount on United States Treasury Obligations	(2,643,581)	(9,157,734)
Net realized (gain) loss on United States Treasury Obligations and Affiliated Investments	(149,132)	20,868
Net change in unrealized (gain) loss on United States Treasury Obligations, Affiliated Investments and Commodity Futures Contracts	20,622,152	(34,953,572)
Change in operating assets and liabilities:
Dividends from affiliates	269,642	89,147
Variation margin - Commodity Futures Contracts	(2,435,086)	(2,949,814)
LME Commodity Futures Contracts	521,101	(25,505,506)
Management fees	(323,508)	(148,480)
Brokerage commissions and fees	686	4,695
Other receivables		17,077
Net cash provided by (used in) operating activities	284,049,686	371,795,154
Cash flows from financing activities:
Proceeds from purchases of Shares	38,133,321	48,178,241
Redemption of Shares	(310,734,938)	(401,013,118)
Increase (decrease) in payable for amount due to custodian		(18,960,277)
Net cash provided by (used in) financing activities	(272,601,617)	(371,795,154)
Net change in cash	11,448,069
Cash at beginning of period	0	0
Cash at end of period	11,448,069	0
Supplemental disclosure of cash flow information
Cash paid for interest	$ 22,212	$ 214,655