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FAIR VALUE OF FINANCIAL INSTRUMENTS (Details 1) - USD ($)
6 Months Ended
Jun. 30, 2017
Dec. 31, 2016
Derivatives not Accounted for as Hedging Instruments Futures - Commodity Contracts   
Condensed Statements of Financial Condition Location Assets  
Futures - Commodity Contracts $ 5,697,000 $ 2,332,880