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Statements of Operations (Unaudited) - USD ($)
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Investment Income    
Interest $ 8,655,661 $ 11,133,496
Total investment income 8,655,661 11,133,496
Expenses    
Sponsor’s fee 1,774,798 1,927,290
Brokerage commissions and fees 122,594 182,572
Total expenses 1,897,392 2,109,862
Net Investment income 6,758,269 9,023,634
Net Realized and Unrealized Gain (Loss)    
Short-term investments 28,115 5,067
Futures contracts 227,639,802 38,182,150
Net realized gain 227,667,917 38,187,217
Net change in unrealized appreciation/depreciation on:    
Short-term investments (285,223) (265,844)
Futures contracts 82,570,068 (1,386,063)
Net change in unrealized appreciation/depreciation 82,284,845 (1,651,907)
Net realized and unrealized gain 309,952,762 36,535,310
Net increase in net assets resulting from operations $ 316,711,031 $ 45,558,944
Net increase in net assets per Share (in dollars per share) [1] $ 8.73 $ 0.98
[1] Net increase in net assets per Share based on average shares outstanding during the period.