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CONTRACTS AND AGREEMENTS - Brokerage Commissions (Details) - USD ($)
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Brokerage commissions $ 46,265 $ 95,085
Commission Member    
Brokerage commissions $ 46,265 $ 95,085
Percentage Of Average Daily Net Assets 0.07% 0.11%
Rebalancing Investments Transaction [Member]    
Brokerage commissions $ 43,934 $ 89,261
Percentage Of Average Daily Net Assets 94.96% 93.87%
Creation And Redemption Activity [Member]    
Brokerage commissions $ 2,331 $ 5,824
Percentage Of Average Daily Net Assets 5.04% 6.13%