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CONTRACTS AND AGREEMENTS (Details) - USD ($)
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Brokerage commissions $ 114,922 $ 27,058 $ 29,674
Percentage Of Average Daily Net Assets 0.12% 0.07% 0.07%
Rebalancing Investments Transaction [Member]      
Brokerage commissions $ 107,744 $ 24,246 $ 24,097
Percentage Of Average Daily Net Assets 93.75% 89.61% 81.21%
Creation And Redemption Activity [Member]      
Brokerage commissions $ 7,178 $ 2,812 $ 5,577
Percentage Of Average Daily Net Assets 6.25% 10.39% 18.79%