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FINANCIAL HIGHLIGHTS (Tables)
 9 Months Ended
Sep. 30, 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 nine months ended September 30, 2013 and 2012 for the unitholders. This information has been derived from information presented in the condensed financial statements.
 
 
For the nine months ended
 
For the nine months ended
 
 
 
September 30, 2013
 
September 30, 2012
 
 
 
(Unaudited)
 
(Unaudited)
 
Per Unit Operating Performance:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Net asset value, beginning of period
 
$
17.23
 
$
21.21
 
Total loss
 
 
(0.19)
 
 
(2.40)
 
Total expenses
 
 
(0.13)
 
 
(0.13)
 
Net decrease in net asset value
 
 
(0.32)
 
 
(2.53)
 
Net asset value, end of period
 
$
16.91
 
$
18.68
 
 
 
 
 
 
 
 
 
Total Return
 
 
(1.86)
%
 
(11.93)
%
 
 
 
 
 
 
 
 
Ratios to Average Net Assets
 
 
 
 
 
 
 
Total income (loss)
 
 
5.56
%
 
(2.93)
%
Management fees*
 
 
0.75
%
 
0.75
%
Total expenses excluding management fees*
 
 
0.45
%
 
0.39
%
Expenses waived*
 
 
(0.24)
%
 
(0.16)
%
Net expenses excluding management fees*
 
 
0.21
%
 
0.23
%
Net income (loss)
 
 
4.84
%
 
(3.66)
%
 
*
Annualized