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ORGANIZATION AND BUSINESS (Details)
 1 Months Ended 12 Months Ended
Nov. 18, 2009
USD ($)
$ / shares
shares
Nov. 30, 2009
shares
Dec. 31, 2022
USD ($)
D
$ / shares
shares
Dec. 31, 2021
$ / shares
Dec. 31, 2020
$ / shares
Dec. 31, 2019
$ / shares
ORGANIZATION AND BUSINESS            
Number of successive valuation days | D     30      
Average daily percentage change in the price of the benchmark futures contract considered     10.00%      
Commenced investment operations date Nov. 18, 2009          
Number of units per basket     50,000      
Transaction fee | $     $ 350      
Number of initially registered units on Form S-1 with the U.S. Securities and Exchange Commission   30,000,000        
Net asset value per share | $ / shares $ 50.00   $ 17.24 $ 11.65 $ 7.74 $ 8.43
Number of units issued 200,000          
Value of unit issued | $ $ 10,000,000          
Number of registered units     30,000,000      
Creation Baskets            
ORGANIZATION AND BUSINESS            
Number of units per basket     50,000