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Statements of Cash Flows - USD ($)
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Cash flows from operating activities:      
Net Income (Loss) $ 36,281,309 $ 11,464,776 $ (3,365,843)
Adjustments to reconcile net income (loss) to net cash provided by (used for) operating activities:      
Cost of securities purchased (107,354,424) (176,229,440) (94,296,203)
Proceeds from securities sold and matured 110,000,000 165,000,064 87,001,400
Cost of affiliated investments purchased (229,512,657) (271,278,307) (234,859,721)
Proceeds from affiliated investments sold 223,545,766 246,563,115 244,587,227
Net accretion of discount on United States Treasury Obligations (2,866,787) (2,748,922) (522,878)
Net realized (gain) loss on United States Treasury Obligations and Affiliated Investments   (63) 25,189
Net change in unrealized (gain) loss on United States Treasury Obligations and Affiliated Investments 1,883 (101,188) (25,294)
Change in operating assets and liabilities:      
Variation margin - Commodity Futures Contracts (2,149,160) 806,575 1,173,420
Cash due from broker     497,255
Dividends from affiliates 28,267 (248,951) (200,625)
Management fee 9,787 22,793 (4,439)
Brokerage commissions and fees (73) (2) 2
Net cash provided by (used for) operating activities 27,983,911 (26,749,550) 9,490
Cash flows from financing activities:      
Distributions paid to shareholders (6,783,254) (6,702,869) (500,466)
Proceeds from purchases of Shares 33,792,953 111,403,530 48,127,811
Redemption of Shares (55,950,715) (78,825,031) (46,762,915)
Increase (Decrease) in payable for amount due to custodian 957,105    
Net cash provided by (used for) financing activities (27,983,911) 25,875,630 864,430
Net change in cash   (873,920) 873,920
Cash at beginning of period 0 873,920 0
Cash at end of period 0 0 873,920
Supplemental disclosure of cash flow information      
Cash paid for interest $ 49,997 $ 29,202 $ 6,842