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FAIR VALUE OF FINANCIAL INSTRUMENTS (Details) - USD ($)
Jun. 30, 2018
Dec. 31, 2017
Short-Term Investments $ 97,176,693 $ 82,786,902
Exchange-Traded Futures Contracts    
Foreign Contracts 6,636,860 5,587,910
Fair Value, Inputs, Level 1 [Member]    
Short-Term Investments 97,176,693 82,786,902
Exchange-Traded Futures Contracts    
Foreign Contracts 6,636,860 5,587,910
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