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FINANCIAL HIGHLIGHTS (Tables) | 12 Months Ended
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Dec. 31, 2024
FINANCIAL HIGHLIGHTS |
Schedule of per share performance data and other supplemental financial data | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Year ended |  | Year ended |  | Year ended | ​
​ | ​ | December 31, 2024 | ​ | December 31, 2023 | ​ | December 31, 2022 | ​
Per Share Operating Performance: |  | ​ |  |  | ​ |  |  | ​ |  | ​
Net asset value, beginning of year | ​ | $ | 35.23 | ​ | $ | 35.45 | ​ | $ | 27.81 | ​
Total income (loss) | ​ |  | 3.17 | ​ |  | 0.06 | ​ |  | 7.95 | ​
Total expenses | ​ |  | (0.39) | ​ |  | (0.28) | ​ |  | (0.31) | ​
Net increase (decrease) in net asset value | ​ |  | 2.78 | ​ |  | (0.22) | ​ |  | 7.64 | ​
Net asset value, end of year | ​ | $ | 38.01 | ​ | $ | 35.23 | ​ | $ | 35.45 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total Return | ​ |  | 7.89 | % |  | (0.62) | % |  | 27.47 | %
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Ratios to Average Net Assets | ​ |  |  | ​ |  |  | ​ |  |  | ​
Total income (loss) | ​ |  | 9.39 | % |  | 0.72 | % |  | 31.17 | %
Management fees | ​ |  | 0.60 | % |  | 0.60 | % |  | 0.60 | %
Total expenses excluding management fees | ​ |  | 0.42 | % |  | 0.19 | % |  | 0.25 | %
Net income (loss) | ​ |  | 8.36 | % |  | (0.07) | % |  | 30.32 | %

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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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