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FINANCIAL HIGHLIGHTS (Tables)
 6 Months Ended
Jun. 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 six months ended June 30, 2013 and 2012 for the unitholders. This information has been derived from information presented in the condensed financial statements.
 
 
 
For the six months ended
June 30, 2013
(Unaudited)
 
 
For the six months ended
June 30, 2012
(Unaudited)
 
Per Unit Operating Performance:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Net asset value, beginning of period
 
$
17.23
 
 
$
21.21
 
Total income (loss)
 
 
0.07
 
 
 
(3.74)
 
Total expenses
 
 
(0.09)
 
 
 
(0.09)
 
Net decrease in net asset value
 
 
(0.02)
 
 
 
(3.83)
 
Net asset value, end of period
 
$
17.21
 
 
$
17.38
 
 
 
 
 
 
 
 
 
 
Total Return
 
 
(0.12)
%
 
 
(18.06)
%
 
 
 
 
 
 
 
 
 
Ratios to Average Net Assets
 
 
 
 
 
 
 
 
Total income (loss)
 
 
5.83
%
 
 
(15.50)
%
Management fees*
 
 
0.75
%
 
 
0.75
%
Total expenses excluding management fees*
 
 
0.38
%
 
 
0.44
%
Expenses waived*
 
 
(0.17)
%
 
 
(0.20)
%
Net expenses excluding management fees*
 
 
0.21
%
 
 
0.24
%
Net income (loss)
 
 
5.35
%
 
 
(15.99)
%
 
*
Annualized