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CONTRACTS AND AGREEMENTS - Brokerage Commissions (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Brokerage commissions	$ 26,184	$ 24,990	$ 77,908	$ 73,083
Percentage Of Average Daily Net Assets	0.12%	0.10%	0.12%	0.10%
Rebalancing Investments Transaction [Member]
Brokerage commissions			$ 76,209	$ 70,419
Percentage Of Average Daily Net Assets	97.82%	96.35%	97.82%	96.35%
Creation And Redemption Activity [Member]
Brokerage commissions			$ 1,699	$ 2,664
Percentage Of Average Daily Net Assets	2.18%	3.65%	2.18%	3.65%

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- Definition

Percentage Of Average Daily Net Assets

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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.

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No definition available.

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