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Schedule of Investments
Mar. 31, 2021
USD ($)
contract
Open Commodity Futures Contracts - Long [Member] | United States [Member]  
Notional Amount $ 8,316,131 [1]
Number of Contracts | contract 298 [1]
Fair Value/ Unrealized Gain (Loss) on Open Commodity Contracts $ (26,921) [1]
% of Partners' Capital (0.33%) [1]
Open Commodity Futures Contracts - Long [Member] | United States [Member] | NYMEX Natural Gas Futures NG May 2021 contracts, expiring April 2021 [Member]  
Notional Amount $ 632,814
Number of Contracts | contract 25
Fair Value/ Unrealized Gain (Loss) on Open Commodity Contracts $ 19,186
% of Partners' Capital 0.23%
Open Commodity Futures Contracts - Long [Member] | United States [Member] | NYMEX Natural Gas Futures NG June 2021 contracts, expiring May 2021 [Member]  
Notional Amount $ 644,460
Number of Contracts | contract 25
Fair Value/ Unrealized Gain (Loss) on Open Commodity Contracts $ 22,290
% of Partners' Capital 0.27%
Open Commodity Futures Contracts - Long [Member] | United States [Member] | NYMEX Natural Gas Futures NG July 2021 contracts, expiring June 2021 [Member]  
Notional Amount $ 657,680
Number of Contracts | contract 25
Fair Value/ Unrealized Gain (Loss) on Open Commodity Contracts $ 25,320
% of Partners' Capital 0.31%
Open Commodity Futures Contracts - Long [Member] | United States [Member] | NYMEX Natural Gas Futures NG August 2021 contracts, expiring July 2021 [Member]  
Notional Amount $ 656,697
Number of Contracts | contract 25
Fair Value/ Unrealized Gain (Loss) on Open Commodity Contracts $ 31,553
% of Partners' Capital 0.38%
Open Commodity Futures Contracts - Long [Member] | United States [Member] | NYMEX Natural Gas Futures NG September 2021 contracts, expiring August 2021 [Member]  
Notional Amount $ 680,616
Number of Contracts | contract 25
Fair Value/ Unrealized Gain (Loss) on Open Commodity Contracts $ 4,384
% of Partners' Capital 0.05%
Open Commodity Futures Contracts - Long [Member] | United States [Member] | NYMEX Natural Gas Futures NG October 2021 contracts, expiring September 2021 [Member]  
Notional Amount $ 708,283
Number of Contracts | contract 25
Fair Value/ Unrealized Gain (Loss) on Open Commodity Contracts $ (19,533)
% of Partners' Capital (0.24%)
Open Commodity Futures Contracts - Long [Member] | United States [Member] | NYMEX Natural Gas Futures NG November 2021 contracts, expiring October 2021  
Notional Amount $ 734,949
Number of Contracts | contract 25
Fair Value/ Unrealized Gain (Loss) on Open Commodity Contracts $ (27,449)
% of Partners' Capital (0.33%)
Open Commodity Futures Contracts - Long [Member] | United States [Member] | NYMEX Natural Gas Futures NG December 2021 contracts, expiring November 2021  
Notional Amount $ 738,491
Number of Contracts | contract 24
Fair Value/ Unrealized Gain (Loss) on Open Commodity Contracts $ (27,851)
% of Partners' Capital (0.34%)
Open Commodity Futures Contracts - Long [Member] | United States [Member] | NYMEX Natural Gas Futures NG January 2022 contracts, expiring December 2021  
Notional Amount $ 766,271
Number of Contracts | contract 25
Fair Value/ Unrealized Gain (Loss) on Open Commodity Contracts $ (4,021)
% of Partners' Capital (0.05%)
Open Commodity Futures Contracts - Long [Member] | United States [Member] | NYMEX Natural Gas Futures NG February 2022 contracts, expiring January 2022  
Notional Amount $ 766,520
Number of Contracts | contract 25
Fair Value/ Unrealized Gain (Loss) on Open Commodity Contracts $ (18,520)
% of Partners' Capital (0.22%)
Open Commodity Futures Contracts - Long [Member] | United States [Member] | NYMEX Natural Gas Futures NG March 2022 contracts, expiring February 2022  
Notional Amount $ 720,410
Number of Contracts | contract 24
Fair Value/ Unrealized Gain (Loss) on Open Commodity Contracts $ (44,090)
% of Partners' Capital (0.53%)
Open Commodity Futures Contracts - Long [Member] | United States [Member] | NYMEX Natural Gas Futures NG April 2022 contracts, expiring March 2022  
Notional Amount $ 608,940
Number of Contracts | contract 25
Fair Value/ Unrealized Gain (Loss) on Open Commodity Contracts $ 11,810
% of Partners' Capital 0.14%
Cash Equivalents [Member] | United States Money Market Funds [Member]  
Market Value $ 7,000,000
% of Partners' Capital 84.53%
Cash Equivalents [Member] | United States Money Market Funds [Member] | Goldman Sachs Financial Square Government Fund - Institutional Shares, 0.04% [Member]  
Principal Amount $ 6,000,000 [2]
Market Value $ 6,000,000 [2]
% of Partners' Capital 72.45% [2]
Cash Equivalents [Member] | United States Money Market Funds [Member] | RBC U.S. Government Money Market Fund - Institutional Shares 0.03% [Member]  
Principal Amount $ 1,000,000 [2]
Market Value $ 1,000,000 [2]
% of Partners' Capital 12.08% [2]
[1] *    Collateral amounted to $882,931 on open commodity futures contracts.
[2] #    Reflects the 7-day yield at March 31, 2021.