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CONTRACTS AND AGREEMENTS (Tables)
 12 Months Ended
Dec. 31, 2018
Contractors [Abstract]  
Brokerage Commissions
 
 
For the Year Ended

December 31, 2018
 
 
For the Year Ended

December 31, 2017
 
 
For the Year Ended

December 31, 2016
 
Total commissions accrued to brokers
 
$
1,424,713
 
 
$
1,728,440
 
 
$
2,000,888
 
Total commissions as annualized percentage of average total net assets
 
 
0.38
%
 
 
0.35
%
 
 
0.37
%
Commissions accrued as a result of rebalancing
 
$
1,053,158
 
 
$
1,420,519
 
 
$
1,872,019
 
Percentage of commissions accrued as a result of rebalancing
 
 
73.92
%
 
 
82.19
%
 
 
93.56
%
Commissions accrued as a result of creation and redemption activity
 
$
371,555
 
 
$
307,921
 
 
$
128,869
 
Percentage of commissions accrued as a result of creation and redemption activity
 
 
26.08
%
 
 
17.81
%
 
 
6.44
%