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Schedule of Investments (Unaudited)
 3 Months Ended 12 Months Ended
Mar. 31, 2025
USD ($)
contract
Dec. 31, 2024
USD ($)
Notional Amount $ 209,368,016 [1] $ 218,659,990 [2]
Fair Value/ Unrealized Gain (Loss) on Open Commodity Contracts 1,475,440 80,696,279
Market Value $ 145,950,000  
% of Partners' Capital 34.67%  
Fair Value/Open Commodity Swap Contracts $ 209,366,385 [1] 218,657,785 [2]
Unrealized Gain (Loss) on Commodity Swap Contracts $ (1,631) [1],[3] $ (2,205) [2],[4]
SOC GEN SGIXCNG1 03272025 Index    
% Fund Pays, Counter party [5] 0.40%  
Payment Frequency [5] Monthly  
Expiration Date [5] Sep. 26, 2025  
Notional Amount [5] $ 106,379,219  
Fair Value/Open Commodity Swap Contracts [5] 106,378,068  
Unrealized Gain (Loss) on Commodity Swap Contracts [3],[5] $ (1,151)  
Scotia SNOVNG1 02282025    
% Fund Pays, Counter party [5] 0.17%  
Payment Frequency [5] Monthly  
Expiration Date [5] Aug. 29, 2025  
Notional Amount [5] $ 102,988,797  
Fair Value/Open Commodity Swap Contracts [5] 102,988,317  
Unrealized Gain (Loss) on Commodity Swap Contracts [3],[5] $ (480)  
Scotia SNOVNG 108202024 Index    
% Fund Pays, Counter party [5]   0.17%
Payment Frequency [5]   monthly
Expiration Date [5]   Feb. 28, 2025
Notional Amount [5]   $ 107,293,519
Fair Value/Open Commodity Swap Contracts [5]   107,292,519
Unrealized Gain (Loss) on Commodity Swap Contracts [4],[5]   $ (1,000)
SOC GEN SGIXCNG 109272024 Index    
% Fund Pays, Counter party [5]   0.40%
Payment Frequency [5]   monthly
Expiration Date [5]   Mar. 27, 2025
Notional Amount [5]   $ 111,366,471
Fair Value/Open Commodity Swap Contracts [5]   111,365,266
Unrealized Gain (Loss) on Commodity Swap Contracts [4],[5]   (1,205)
NYMEX Natural Gas August 2023 contracts, expiring July 2023    
Number of Contracts | contract 5,138  
Open Commodity Futures Contracts - Long | United States | NYMEX Natural Gas Futures NG February 2025 contracts, expiring January 2025    
Notional Amount [2],[6]   $ 444,599,191
Number of Contracts [2],[6]   14,459
Fair Value/ Unrealized Gain (Loss) on Open Commodity Contracts [2],[6]   $ 80,696,279
% of Partners' Capital [2],[6]   10.85%
Open Commodity Futures Contracts - Long | United States | NYMEX Natural Gas Futures NG May 2025 contracts, expiring April 2025    
Notional Amount [7] $ 210,158,780  
Number of Contracts | contract [7] 5,138  
Fair Value/ Unrealized Gain (Loss) on Open Commodity Contracts [7] $ 1,475,440  
% of Partners' Capital [7] 0.35%  
Cash Equivalents | United States    
Market Value   $ 532,370,156
% of Partners' Capital   71.58%
Cash Equivalents | United States | US Treasury Securities | U.S. Treasury Bills 4.39%, 2/27/2025    
Shares/Principal Amount   $ 11,500,000
Market Value   $ 11,420,156
% of Partners' Capital   1.54%
Cash Equivalents | United States | Money Market Funds    
Market Value   $ 520,950,000
% of Partners' Capital   70.04%
Cash Equivalents | United States | Money Market Funds | Morgan Stanley Institutional Liquidity Funds - Government Portfolio - Institutional Shares    
Shares/Principal Amount $ 145,950,000 [8] $ 520,950,000 [9]
Market Value $ 145,950,000 [8] $ 520,950,000 [9]
% of Partners' Capital 34.67% [8] 70.04% [9]
[1] Collateral amounted to $52,099,408 on open OTC commodity swap contracts.
[2] Collateral amounted to $37,100,156 on open OTC commodity swap contracts.
[3] Reflects the value at reset date of March 31, 2025.
[4] Reflects the value at reset date of December 31, 2024.
[5] Custom index comprised of a basket of underlying instruments.
[6] Collateral amounted to $46,487,832 on open commodity futures contracts
[7] Collateral amounted to $86,060,510 on open commodity futures contracts.
[8] Reflects the 7-day yield at March 31, 2025.
[9] Reflects the 7-day yield at December 31, 2024.