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FAIR VALUE OF FINANCIAL INSTRUMENTS (Details) - USD ($)
Dec. 31, 2016
Dec. 31, 2015
Short-Term Investments $ 96,899,767 $ 64,945,289
Exchange-Traded Futures Contracts    
Foreign Contracts 2,332,880 (7,442,340)
Fair Value, Inputs, Level 1 [Member]    
Short-Term Investments 96,899,767 64,945,289
Exchange-Traded Futures Contracts    
Foreign Contracts 2,332,880 (7,442,340)
Fair Value, Inputs, Level 2 [Member]    
Short-Term Investments 0 0
Exchange-Traded Futures Contracts    
Foreign Contracts 0 0
Fair Value, Inputs, Level 3 [Member]    
Short-Term Investments 0 0
Exchange-Traded Futures Contracts    
Foreign Contracts $ 0 $ 0