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FINANCIAL HIGHLIGHTS (Tables)
 3 Months Ended
Mar. 31, 2017
Financial Highlights [Abstract]  
Per Unit Performance Data And Other Supplemental Financial Data
This information has been derived from information presented in the condensed financial statements.
 
 
 
For the three months ended
March 31, 2017
(Unaudited)
 
 
For the three months ended
March 31, 2016
(Unaudited)
 
Per Share Operating Performance:
 
 
 
 
 
 
 
 
Net asset value, beginning of period
 
$
11.71
 
 
$
11.02
 
Total income (loss)
 
 
(1.07)
 
 
 
(1.26)
 
Total expenses
 
 
(0.02)
 
 
 
(0.02)
 
Net increase (decrease) in net asset value
 
 
(1.09)
 
 
 
(1.28)
 
Net asset value, end of period
 
$
10.62
 
 
$
9.74
 
 
 
 
 
 
 
 
 
 
Total Return
 
 
(9.31)
%
 
 
(11.62)
%
 
 
 
 
 
 
 
 
 
Ratios to Average Net Assets
 
 
 
 
 
 
 
 
Total income (loss)
 
 
(8.52)
%
 
 
(4.91)
%
Management fees*
 
 
0.45
%
 
 
0.45
%
Expenses excluding management fees*
 
 
0.28
%
 
 
0.37
%
Net income (loss)
 
 
(8.71)
%
 
 
(5.11)
%
 
*     Annualized.