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Financial Highlights
3 Months Ended
Mar. 31, 2012
Financial Highlights [Abstract]  
Financial Highlights

 
2.  
Financial Highlights
 
 
Financial Highlights for the three months ended March 31, 2012 and 2011 were as follows:
                                            
  For the Quarters Ended March 31,
 
2012
2011
         Per Unit Operating Performance:
   
         Net asset value, January 1:
$     31.24
$     38.03
     
                     Interest Income
        -  (3)
        0.01
                     Expenses
       (0.62)
       (0.87)
                     Realized/Unrealized Income (Loss) (1)
        0.46
       (0.73) (4)
                     Net Loss
       (0.16)
       (1.59)
     
         Net asset value, March 31:
$     31.08
$     36.44
     
         Ratios to average net assets:
   
                     Net Investment Loss (2)
       (8.0)%
       (8.7)%
                     Expenses before  Incentive Fees (2)
        8.0%
        8.5%
                     Expenses after Incentive Fees (2)
        8.0%
        8.8%
                     Net Loss (2)
       (1.9) %
     (16.6) %
         Total return before incentive fees
       (0.5)%
       (3.9)%
         Total return after incentive fees
       (0.5)%
       (4.2)%


  (1) Realized/Unrealized Income (Loss) is a balancing amount necessary to reconcile the change in net asset value per Unit
       with the other per Unit information.
   (2) Annualized (except for incentive fees, if applicable).
   (3) Amounts less than $0.005 per Unit.

   (4) These amounts have been reclassified from the prior year financial statements to conform to the current year presentation. Specifically, realized and unrealized income (loss) per Unit amounts were combined in the 2011 Financial Highlights presentation.