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FINANCIAL HIGHLIGHTS (Tables) | 9 Months Ended
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Sep. 30, 2023
FINANCIAL HIGHLIGHTS |
Schedule of per unit performance data and other supplemental financial data | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three months ended | ​ | Three months ended | ​ | Nine months ended |  | Nine months ended | ​
​ | ​ | September 30, 2023 | ​ | September 30, 2022 | ​ | September 30, 2023 | ​ | September 30, 2022 | ​
​ |  | (Unaudited) |  | (Unaudited) |  | (Unaudited) |  | (Unaudited) | ​
Per Share Operating Performance: |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  | ​
Net asset value, beginning of period | ​ | $ | 32.70 | ​ | $ | 39.48 | ​ | $ | 35.45 | ​ | $ | 27.81 | ​
Total income (loss) | ​ |  | 7.44 | ​ |  | (6.95) | ​ |  | 4.81 | ​ |  | 4.88 | ​
Total expenses | ​ |  | (0.08) | ​ |  | (0.08) | ​ |  | (0.20) | ​ |  | (0.24) | ​
Net increase (decrease) in net asset value | ​ |  | 7.36 | ​ |  | (7.03) | ​ |  | 4.61 | ​ |  | 4.64 | ​
Net asset value, end of period | ​ | $ | 40.06 | ​ | $ | 32.45 | ​ | $ | 40.06 | ​ | $ | 32.45 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total Return | ​ |  | 22.51 | % |  | (17.81) | % |  | 13.00 | % |  | 16.68 | %
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Ratios to Average Net Assets | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​
Total income (loss) | ​ |  | 20.38 | % |  | (18.84) | % |  | 13.18 | % |  | 22.56 | %
Management fees# | ​ |  | 0.60 | % |  | 0.60 | % |  | 0.60 | % |  | 0.60 | %
Total expenses excluding management fees# | ​ |  | 0.21 | % |  | 0.23 | % |  | 0.17 | % |  | 0.28 | %
Net income (loss) | ​ |  | 20.17 | % |  | (19.05) | % |  | 12.61 | % |  | 21.90 | %
# 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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