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v3.19.3.a.u2

FINANCIAL HIGHLIGHTS (Details) - $ / shares | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Per Share Operating Performance: |  |  |
Net asset value, beginning of year | $ 9.59 | $ 12.08 | $ 11.71
Total income (loss) | 3.28 | (2.39) | 0.45
Total expenses | (0.09) | (0.10) | (0.08)
Net increase (decrease) in net asset value | 3.19 | (2.49) | 0.37
Net asset value, end of year | $ 12.78 | $ 9.59 | $ 12.08
Total Return | 33.26% | (20.61%) | 3.16%
Ratios to Average Net Assets |  |  |
Total income (loss) | 33.77% | (15.36%) | 3.75%
Management fees | 0.45% | 0.45% | 0.45%
Expenses excluding management fees | 0.34% | 0.28% | 0.31%
Net income (loss) | 32.97% | (16.09%) | 2.99%

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