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Condensed Statements of Operations - USD ($)
 3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Gain (loss) on trading of commodity futures contracts:    
Change in unrealized gain (loss) on open commodity futures contracts $ 52,714,517 $ 20,781,089
Dividend income 40,104 8,170
Interest income* [1] 15,046 21,859
ETF transaction fees 49,000 40,000
Total Income (Loss) 210,949,307 29,808,098
Expenses    
General Partner management fees (Note 3) 534,048 520,978
Professional fees 137,374 125,074
Brokerage commissions 204,388 257,862
Directors' fees and insurance 21,193 18,891
License fees 13,351 13,024
Registration fees 0 81,000
Total Expenses 910,354 1,016,829
Net Income (Loss) $ 210,038,953 $ 28,791,269
Net Income (Loss) per limited partner share $ 7.30 $ 0.41
Net Income (Loss) per weighted average limited partner share $ 9.00 $ 0.82
Weighted average limited partner shares outstanding 23,343,477 35,046,810
Futures Contracts [Member]    
Gain (loss) on trading of commodity futures contracts:    
Realized gain (loss) on closed commodity futures contracts $ 158,130,640 $ 8,956,980
[1] *     Interest income does not exceed paid in kind of 5%.