Statements of Cash Flows (Unaudited) - USD ($)	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash flows from operating activities:
Net Income (Loss)	$ (256,534,214)	$ 99,574,221
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Cost of securities purchased	(858,980,266)	(3,011,434,334)
Proceeds from securities sold and matured	1,156,994,204	3,530,220,557
Cost of affiliated investments purchased	(1,806,051,012)	(2,309,633,070)
Proceeds from affiliated investments sold	1,925,717,569	2,388,424,582
Net accretion of discount on United States Treasury Obligations	(3,193,929)	(24,024,190)
Net realized (gain) loss on United States Treasury Obligations and Affiliated Investments	(534,287)	(32,242)
Net change in unrealized (gain) loss on United States Treasury Obligations, Affiliated Investments and LME Commodity Futures Contracts	(13,880,463)	(26,949,632)
Change in operating assets and liabilities:
Dividends from affiliates	342,348	136,102
Variation margin - Commodity Futures Contracts	(20,275,683)	13,813,977
LME Commodity Futures Contracts	(3,302,935)	(13,942,706)
Management fees	(287,500)	(422,532)
Brokerage commissions and fees	1,778	4,447
Other receivables		17,077
Net cash provided by (used in) operating activities	120,015,610	645,752,257
Cash flows from financing activities:
Proceeds from purchases of Shares	255,230,466	51,179,193
Redemption of Shares	(375,246,076)	(677,971,167)
Increase (decrease) in payable for amount due to custodian		(18,960,283)
Net cash provided by (used in) financing activities	(120,015,610)	(645,752,257)
Net change in cash	0	0
Cash at beginning of period	0	0
Cash at end of period	0	0
Supplemental disclosure of cash flow information
Cash paid for interest	$ 38,852	$ 290,361