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Condensed Schedule of Investments
Sep. 30, 2021
USD ($)
contract
Fair Value/ Unrealized Gain (Loss) on Open Commodity Contracts $ 30,233,070
Open Commodity Futures Contracts, Long [Member] | United States [Member] | NYMEX Natural Gas NG November 2021 contracts, expiring October 2021 [Member]  
Notional Amount $ 383,449,100 [1]
Number of Contracts | contract 7,051 [1]
Fair Value/ Unrealized Gain (Loss) on Open Commodity Contracts $ 30,233,070 [1]
% of Partners' Capital 7.31% [1]
Cash Equivalents [Member] | United States [Member] | Money Market Funds [Member]  
Market Value $ 174,943,000
% of Partners' Capital 42.29%
Cash Equivalents [Member] | United States [Member] | Money Market Funds [Member] | Goldman Sachs Financial Square Government Fund Institutional Shares [Member]  
Shares/Principal Amount $ 1,103,000 [2]
Market Value $ 1,103,000 [2]
% of Partners' Capital 0.27% [2]
Cash Equivalents [Member] | United States [Member] | Money Market Funds [Member] | Morgan Stanley Institutional Liquidity Funds Government Portfolio Institutional Shares [Member]  
Shares/Principal Amount $ 166,300,000 [2]
Market Value $ 166,300,000 [2]
% of Partners' Capital 40.20% [2]
Cash Equivalents [Member] | United States [Member] | Money Market Funds [Member] | RBC U.S. Government Money Market Fund Institutional Shares [Member]  
Shares/Principal Amount $ 7,540,000 [2]
Market Value $ 7,540,000 [2]
% of Partners' Capital 1.82% [2]
[1] Collateral amounted to $94,114,168 on open commodity futures contracts.
[2] Reflects the 7-day yield at September 30, 2021.