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FINANCIAL HIGHLIGHTS (Tables)
3 Months Ended
Mar. 31, 2013
Financial Highlights [Abstract]  
Per Unit Performance Data and Other Supplemental Financial Data

The following table presents per unit performance data and other supplemental financial data for the three months ended March 31, 2013 and 2012 for the unitholders. This information has been derived from information presented in the condensed financial statements.

 

    For the three months ended
March 31, 2013
(Unaudited)
    For the three months ended
March 31, 2012
(Unaudited)
 
Per Unit Operating Performance:                
                 
Net asset value, beginning of period   $ 17.23     $ 21.21  
Total income (loss)     2.09       (4.79 )
Total expenses     (0.04 )     (0.05 )
Net increase (decrease) in net asset value     2.05       (4.84 )
Net asset value, end of period   $ 19.28     $ 16.37  
                 
Total Return     11.90 %     (22.82 )%
                 
Ratios to Average Net Assets                
Total income (loss)     11.51 %     (28.65 )%
Management fees*     0.75 %     0.75 %
Total expenses excluding management fees*     0.34 %     0.52 %
Expenses waived*     (0.13 )%     (0.28 )%
Net expenses excluding management fees*     0.21 %     0.24 %
Net income (loss)     11.27 %     (28.89 )%

 

* Annualized