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FINANCIAL HIGHLIGHTS (Details) - $ / shares
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Per Share Operating Performance:    
Net asset value, beginning of period $ 16.85 $ 20.36
Total income (loss) 4.75 (5.56)
Total expenses (0.06) (0.06)
Net increase (decrease) in net asset value 4.69 (5.62)
Net asset value, end of period $ 21.54 $ 14.74
Total Return 27.83% (27.60%)
Ratios to Average Net Assets    
Total income (loss) 34.42% (19.68%)
Management fees 0.60% 0.60%
Total expenses excluding management fees 0.68% 0.65%
Net income (loss) 34.10% (20.00%)