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FINANCIAL HIGHLIGHTS (Details) - $ / shares | 9 Months Ended
--- | ---
Sep. 30, 2015 | Sep. 30, 2014
Per Share Operating Performance: |  |  |
Net asset value, beginning of period |  | $ 22.39 | $ 43.81
Total income (loss) |  | (5.69) | (5.79)
Net expenses |  | (0.14) | (0.30)
Net increase (decrease) in net asset value |  | (5.83) | (6.09)
Net asset value, end of period |  | $ 16.56 | $ 37.72
Total Return |  | (26.04%) | (13.90%)
Ratios to Average Net Assets |  |  |
Total income (loss) |  | (20.15%) | (18.50%)
Management fees | [1] | 0.75% | 0.75%
Total expenses excluding management fees | [1] | 0.28% | 0.51%
Expenses waived | [1] | (0.13%) | (0.33%)
Net expenses excluding management fees | [1] | 0.15% | 0.18%
Net income (loss) |  | (20.82%) | (19.20%)
[1] | Annualized.

X
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