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FINANCIAL HIGHLIGHTS (Tables) | 6 Months Ended
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Jun. 30, 2023
FINANCIAL HIGHLIGHTS |
Schedule of per unit performance data and other supplemental financial data | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three months ended | ​ | Three months ended | ​ | Six months ended |  | Six months ended | ​
​ | ​ | June 30, 2023 | ​ | June 30, 2022 | ​ | June 30, 2023 | ​ | June 30, 2022 | ​
​ |  | (Unaudited) |  | (Unaudited) |  | (Unaudited) |  | (Unaudited) | ​
Per Share Operating Performance: |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  | ​
Net asset value, beginning of period | ​ | $ | 33.77 | ​ | $ | 36.99 | ​ | $ | 35.45 | ​ | $ | 27.81 | ​
Total income (loss) | ​ |  | (1.01) | ​ |  | 2.58 | ​ |  | (2.63) | ​ |  | 11.83 | ​
Total expenses | ​ |  | (0.06) | ​ |  | (0.09) | ​ |  | (0.12) | ​ |  | (0.16) | ​
Net increase (decrease) in net asset value | ​ |  | (1.07) | ​ |  | 2.49 | ​ |  | (2.75) | ​ |  | 11.67 | ​
Net asset value, end of period | ​ | $ | 32.70 | ​ | $ | 39.48 | ​ | $ | 32.70 | ​ | $ | 39.48 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total Return | ​ |  | (3.17) | % |  | 6.73 | % |  | (7.76) | % |  | 41.96 | %
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Ratios to Average Net Assets | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​
Total income (loss) | ​ |  | (2.45) | % |  | 6.58 | % |  | (6.94) | % |  | 35.44 | %
Management fees# | ​ |  | 0.60 | % |  | 0.60 | % |  | 0.60 | % |  | 0.60 | %
Total expenses excluding management fees# | ​ |  | 0.15 | % |  | 0.30 | % |  | 0.15 | % |  | 0.30 | %
Net income (loss) | ​ |  | (2.64) | % |  | 6.35 | % |  | (7.31) | % |  | 35.00 | %
# 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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