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Condensed Schedule of Investments
Sep. 30, 2020
USD ($)
contract
Open Commodity Futures Contracts - Long [Member] | United States [Member]  
Notional Amount $ 5,802,195 [1]
Number of Contracts | contract 222 [1]
Fair Value/ Unrealized Gain (Loss) on Open Commodity Contracts $ 633,095 [1]
% of Partners' Capital 9.85% [1]
Open Commodity Futures Contracts - Long [Member] | United States [Member] | NYMEX Natural Gas Futures NG November 2020 contracts, expiring October 2020 [Member]  
Notional Amount $ 451,155
Number of Contracts | contract 19
Fair Value/ Unrealized Gain (Loss) on Open Commodity Contracts $ 28,975
% of Partners' Capital 0.45%
Open Commodity Futures Contracts - Long [Member] | United States [Member] | NYMEX Natural Gas Futures NG December 2020 contracts, expiring November 2020 [Member]  
Notional Amount $ 495,791
Number of Contracts | contract 18
Fair Value/ Unrealized Gain (Loss) on Open Commodity Contracts $ 65,269
% of Partners' Capital 1.02%
Open Commodity Futures Contracts - Long [Member] | United States [Member] | NYMEX Natural Gas Futures NG January 2021 contracts, expiring December 2020 [Member]  
Notional Amount $ 532,111
Number of Contracts | contract 19
Fair Value/ Unrealized Gain (Loss) on Open Commodity Contracts $ 88,619
% of Partners' Capital 1.38%
Open Commodity Futures Contracts - Long [Member] | United States [Member] | NYMEX Natural Gas Futures NG February 2021 contracts, expiring January 2021 [Member]  
Notional Amount $ 503,227
Number of Contracts | contract 18
Fair Value/ Unrealized Gain (Loss) on Open Commodity Contracts $ 76,553
% of Partners' Capital 1.19%
Open Commodity Futures Contracts - Long [Member] | United States [Member] | NYMEX Natural Gas Futures NG March 2021 contracts, expiring February 2021 [Member]  
Notional Amount $ 473,334
Number of Contracts | contract 18
Fair Value/ Unrealized Gain (Loss) on Open Commodity Contracts $ 84,486
% of Partners' Capital 1.31%
Open Commodity Futures Contracts - Long [Member] | United States [Member] | NYMEX Natural Gas Futures NG April 2021 contracts, expiring March 2021 [Member]  
Notional Amount $ 446,890
Number of Contracts | contract 19
Fair Value/ Unrealized Gain (Loss) on Open Commodity Contracts $ 83,970
% of Partners' Capital 1.31%
Open Commodity Futures Contracts - Long [Member] | United States [Member] | NYMEX Natural Gas Futures NG May 2021 contracts, expiring April 2021 [Member]  
Notional Amount $ 469,707
Number of Contracts | contract 19
Fair Value/ Unrealized Gain (Loss) on Open Commodity Contracts $ 52,413
% of Partners' Capital 0.81%
Open Commodity Futures Contracts - Long [Member] | United States [Member] | NYMEX Natural Gas Futures NG June 2021 contracts, expiring May 2021 [Member]  
Notional Amount $ 452,677
Number of Contracts | contract 18
Fair Value/ Unrealized Gain (Loss) on Open Commodity Contracts $ 46,643
% of Partners' Capital 0.73%
Open Commodity Futures Contracts - Long [Member] | United States [Member] | NYMEX Natural Gas Futures NG July 2021 contracts, expiring June 2021 [Member]  
Notional Amount $ 459,850
Number of Contracts | contract 18
Fair Value/ Unrealized Gain (Loss) on Open Commodity Contracts $ 45,770
% of Partners' Capital 0.71%
Open Commodity Futures Contracts - Long [Member] | United States [Member] | NYMEX Natural Gas Futures NG August 2021 contracts, expiring July 2021 [Member]  
Notional Amount $ 481,950
Number of Contracts | contract 19
Fair Value/ Unrealized Gain (Loss) on Open Commodity Contracts $ 53,090
% of Partners' Capital 0.83%
Open Commodity Futures Contracts - Long [Member] | United States [Member] | NYMEX Natural Gas Futures NG September 2021 contracts, expiring August 2021 [Member]  
Notional Amount $ 487,213
Number of Contracts | contract 18
Fair Value/ Unrealized Gain (Loss) on Open Commodity Contracts $ 17,327
% of Partners' Capital 0.27%
Open Commodity Futures Contracts - Long [Member] | United States [Member] | NYMEX Natural Gas Futures NG October 2021 contracts, expiring September 2021 [Member]  
Notional Amount $ 548,290
Number of Contracts | contract 19
Fair Value/ Unrealized Gain (Loss) on Open Commodity Contracts $ (10,020)
% of Partners' Capital (0.16%)
Cash Equivalents [Member] | United States Money Market Funds [Member]  
Market Value $ 1,000,000
% of Partners' Capital 15.56%
Cash Equivalents [Member] | United States Money Market Funds [Member] | Goldman Sachs Financial Square Funds - Government Fund - Class FS, 0.00% [Member]  
Principal Amount $ 500,000 [2]
Market Value $ 500,000 [2]
% of Partners' Capital 7.78% [2]
Cash Equivalents [Member] | United States Money Market Funds [Member] | RBC U.S. Government Money Market Fund - Institutional Share Class, 0.03% [Member]  
Principal Amount $ 500,000 [2]
Market Value $ 500,000 [2]
% of Partners' Capital 7.78% [2]
[1] Collateral amounted to $633,095 on open commodity futures contracts.
[2] Reflects the 7-day yield at September 30, 2020.