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CONTRACTS AND AGREEMENTS (Brokerage Commission) (Detail) - USD ($) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017
Brokerage commissions | $ 652,149 | $ 1,365,114 | $ 1,346,629 | $ 2,526,521
Commission [Member] |  |  |  |
Brokerage commissions |  |  | $ 1,346,629 | $ 2,526,521
Percentage of average daily net assets | 0.14% | 0.18% | 0.14% | 0.18%
Rebalancing Investments Transaction [Member] |  |  |  |
Brokerage commissions |  |  | $ 1,151,426 | $ 2,238,003
Percentage of average daily net assets | 85.50% | 88.58% | 85.50% | 88.58%
Creation And Redemption Activity [Member] |  |  |  |
Brokerage commissions |  |  | $ 195,203 | $ 288,518
Percentage of average daily net assets | 14.50% | 11.42% | 14.50% | 11.42%

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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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- Definition Percentage of Average Daily Net Assets + References No definition available. + Details
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- Details
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- Details
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