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Statements of Cash Flows (Unaudited) - USD ($)
 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Cash flows from operating activities:    
Net Income (Loss) $ 18,011,332 $ 88,431,244
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:    
Cost of securities purchased (681,625,361)
Proceeds from securities sold and matured 400,000,000 800,000,000
Cost of affiliated investments purchased (604,887,271) (1,161,205,568)
Proceeds from affiliated investments sold 479,075,024 1,022,392,644
Net accretion of discount on United States Treasury Obligations (7,165,395) (19,468,630)
Net realized (gain) loss on United States Treasury Obligations and Affiliated Investments 1
Net change in unrealized (gain) loss on United States Treasury Obligations, Affiliated Investments and LME Commodity Futures Contracts (8,254,392) (9,249,115)
Change in operating assets and liabilities:    
Variation margin - Commodity Futures Contracts 5,450,444 (3,097,040)
Deposit with Commodity Broker (205,072,113)
Dividends from affiliates 45,023 206,165
Investments sold (824)
LME Commodity Futures Contracts (1,429,477) (5,384,205)
Management fees 681,503 (63,484)
Brokerage commissions and fees (932) (706)
Net cash provided by (used in) operating activities 76,452,922 30,935,945
Cash flows from financing activities:    
Distributions paid to shareholders (599,093)
Proceeds from purchases of Shares 153,124,062 156,614,262
Redemption of Shares (238,885,750) (186,951,114)
Increase (decrease) in payable for amount due to custodian 667
Net cash provided by (used in) financing activities (85,761,021) (30,935,945)
Net change in cash (9,308,099)
Cash at beginning of period 9,308,099
Cash at end of period 0 0
Supplemental disclosure of cash flow information    
Cash paid for interest $ 78,941 $ 187,356