Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities:
Net Income (Loss)	$ (20,009,384)	$ 16,980,569
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Cost of securities purchased	(31,945,891)	(104,524,597)
Proceeds from securities sold and matured	11,000,000	141,895,247
Cost of affiliated investments purchased	(25,221,578)	(129,543,885)
Proceeds from affiliated investments sold	61,807,437	125,828,951
Net accretion of discount on United States Treasury Obligations	(248,486)	(972,660)
Net realized (gain) loss on United States Treasury Obligations and Affiliated Investments		(154)
Net change in unrealized (gain) loss on United States Treasury Obligations, Affiliated Investments and Commodity Futures Contracts	16,988,095	(21,472,438)
Change in operating assets and liabilities:
Dividends from affiliates	3,072	10,665
LME Commodity Futures Contracts	275,437	(28,848,313)
Management fees	(17,030)	4,333
Brokerage commissions and fees	229	588
Net cash provided by (used in) operating activities	12,631,901	(641,694)
Cash flows from financing activities:
Proceeds from purchases of Shares	12,134,870	26,281,459
Redemption of Shares	(24,766,771)	(23,007,147)
Increase (decrease) in payable for amount due to custodian		(2,632,618)
Net cash provided by (used in) financing activities	(12,631,901)	641,694
Cash at beginning of period	0	0
Cash at end of period	0	0
Supplemental disclosure of cash flow information
Cash paid for interest	$ 875	$ 172,391