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Statements of Cash Flows (Unaudited) - USD ($)
 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Cash flows from operating activities:    
Net Income (Loss) $ 10,193,094 $ (2,204,986)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:    
Cost of securities purchased (681,625,372) (2,044,339,627)
Proceeds from securities sold and matured 800,000,000 2,559,999,849
Cost of affiliated investments purchased (1,411,042,779) (2,865,333,743)
Proceeds from affiliated investments sold 1,601,661,774 2,879,370,126
Net accretion of discount on United States Treasury Obligations (28,673,465) (34,995,540)
Net realized (gain) loss on United States Treasury Obligations and Affiliated Investments 11 151
Net change in unrealized (gain) loss on United States Treasury Obligations, Affiliated Investments and LME Commodity Futures Contracts (7,580,474) (31,664,533)
Change in operating assets and liabilities:    
Dividends from affiliates 1,587,660 (480,971)
Variation margin - Commodity Futures Contracts (10,736,710) 54,978,556
LME Commodity Futures Contracts (9,525,877) (48,841,238)
Management fees (274,803) (490,057)
Brokerage commissions and fees 509 2,069
Net cash provided by (used in) operating activities 263,983,568 466,000,056
Cash flows from financing activities:    
Distributions paid to shareholders (599,093)  
Proceeds from purchases of Shares 189,030,873 293,447,991
Redemption of Shares (452,415,348) (759,448,047)
Net cash provided by (used in) financing activities (263,983,568) (466,000,056)
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 $ 324,866 $ 382,890