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FINANCIAL HIGHLIGHTS (Tables) | 9 Months Ended
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Sep. 30, 2025
FINANCIAL HIGHLIGHTS |
Summary of per share performance data and other supplemental financial data | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Three months ended |  | Three months ended |  | Nine months ended |  | Nine months ended | ​
​ | ​ | September 30, 2025 |  | September 30, 2024 | ​ | September 30, 2025 |  | September 30, 2024 | ​
​ | ​ | (Unaudited) | ​ | (Unaudited) | ​ | (Unaudited) | ​ | (Unaudited) | ​
Per Share Operating Performance: | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | ​
Net asset value, beginning of period | ​ | $ | 15.31 | ​ | $ | 17.39 | ​ | $ | 16.85 | ​ | $ | 20.36 | ​
Total income (loss) | ​ |  | (2.30) | ​ |  | (0.91) | ​ |  | (3.74) | ​ |  | (3.78) | ​
Total expenses | ​ |  | (0.04) | ​ |  | (0.05) | ​ |  | (0.14) | ​ |  | (0.15) | ​
Net increase (decrease) in net asset value | ​ |  | (2.34) | ​ |  | (0.96) | ​ |  | (3.88) | ​ |  | (3.93) | ​
Net asset value, end of period | ​ | $ | 12.97 | ​ | $ | 16.43 | ​ | $ | 12.97 | ​ | $ | 16.43 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total Return | ​ |  | (15.28) | % |  | (5.52) | % |  | (23.03) | % |  | (19.30) | %
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Ratios to Average Net Assets | ​ |  | ​ | ​ |  |  | ​ |  | ​ | ​ |  |  | ​
Total income (loss) | ​ |  | (10.88) | % |  | 0.56 | % |  | 7.05 | % |  | 2.35 | %
Management fees# | ​ |  | 0.60 | % |  | 0.60 | % |  | 0.60 | % |  | 0.60 | %
Total expenses excluding management fees# | ​ |  | 0.49 | % |  | 0.66 | % |  | 0.59 | % |  | 0.66 | %
Net income (loss) | ​ |  | (11.15) | % |  | 0.24 | % |  | 6.15 | % |  | 1.41 | %
# | Annualized.

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- Definition Tabular disclosure of per unit performance data and other supplemental financial data. + References No definition available. + Details
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