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CONTRACTS AND AGREEMENTS (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Brokerage commissions | $ 132,707 | $ 165,409 | $ 114,922
Percentage Of Average Daily Net Assets | 0.13% | 0.15% | 0.12%
Rebalancing Investments Transaction [Member] |  |  |
Brokerage commissions | $ 127,847 | $ 160,817 | $ 107,744
Percentage Of Average Daily Net Assets | 96.34% | 97.22% | 93.75%
Creation And Redemption Activity [Member] |  |  |
Brokerage commissions | $ 4,860 | $ 4,592 | $ 7,178
Percentage Of Average Daily Net Assets | 3.66% | 2.78% | 6.25%

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- Definition The amount of expense during the period for floor brokerage fees paid to other broker-dealers to execute trades on their behalf, stock exchange fees, order flow fees, and clearance fees. + References No definition available. + Details
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- Details
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