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FAIR VALUE OF FINANCIAL INSTRUMENTS - Valuation of securities using fair value hierarchy (Details) - USD ($)
Mar. 31, 2026
Dec. 31, 2025
Short-Term Investments    
FAIR VALUE OF FINANCIAL INSTRUMENTS    
Securities, fair value $ 89,500,000 $ 29,500,000
Exchange-Traded Futures Contracts | United States Contracts    
FAIR VALUE OF FINANCIAL INSTRUMENTS    
Securities, fair value 5,449,580 709,073
Level I | Short-Term Investments    
FAIR VALUE OF FINANCIAL INSTRUMENTS    
Securities, fair value 89,500,000 29,500,000
Level I | Exchange-Traded Futures Contracts | United States Contracts    
FAIR VALUE OF FINANCIAL INSTRUMENTS    
Securities, fair value 5,449,580 709,073
Level II | Short-Term Investments    
FAIR VALUE OF FINANCIAL INSTRUMENTS    
Securities, fair value 0 0
Level II | Exchange-Traded Futures Contracts | United States Contracts    
FAIR VALUE OF FINANCIAL INSTRUMENTS    
Securities, fair value 0 0
Level III | Short-Term Investments    
FAIR VALUE OF FINANCIAL INSTRUMENTS    
Securities, fair value 0 0
Level III | Exchange-Traded Futures Contracts | United States Contracts    
FAIR VALUE OF FINANCIAL INSTRUMENTS    
Securities, fair value $ 0 $ 0