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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 | ​
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​ |  | 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 | ​ | $ | 73.25 | ​ | $ | 79.63 | ​ | $ | 75.45 | ​ | $ | 66.91 | ​
Total income (loss) | ​ |  | 0.49 | ​ |  | (9.61) | ​ | ​ | (1.40) | ​ | ​ | 3.41 | ​
Total expenses | ​ |  | (0.16) | ​ |  | (0.16) | ​ | ​ | (0.47) | ​ | ​ | (0.46) | ​
Net increase (decrease) in net asset value | ​ |  | 0.33 | ​ |  | (9.77) | ​ | ​ | (1.87) | ​ | ​ | 2.95 | ​
Net asset value, end of period | ​ | $ | 73.58 | ​ | $ | 69.86 | ​ | $ | 73.58 | ​ | $ | 69.86 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total Return | ​ |  | 0.45 | % |  | (12.27) | % | ​ | (2.48) | % | ​ | 4.41 | %
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Ratios to Average Net Assets | ​ |  | ​ | ​ |  | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total income (loss) | ​ |  | 2.61 | % |  | (10.48) | % | ​ | (0.29) | % | ​ | 9.94 | %
Management fees# | ​ |  | 0.45 | % |  | 0.45 | % | ​ | 0.45 | % | ​ | 0.45 | %
Total expenses excluding management fees# | ​ |  | 0.40 | % |  | 0.39 | % | ​ | 0.40 | % | ​ | 0.37 | %
Net income (loss) | ​ |  | 2.40 | % |  | (10.69) | % | ​ | (0.92) | % | ​ | 9.32 | %
# | 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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