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Condensed Schedule of Investments
Jun. 30, 2020
USD ($)
contract
Open Commodity Futures Contracts - Long [Member] | United States [Member]  
Notional Amount $ 4,680,450 [1],[2]
Number of Contracts | contract 188 [1],[2]
Fair Value/ Unrealized Gain (Loss) on Open Commodity Contracts $ (157,130) [1],[2]
% of Partners' Capital (3.47%) [1],[2]
Open Commodity Futures Contracts - Long [Member] | United States [Member] | NYMEX Natural Gas Futures NG August 2020 contracts, expiring July 2020  
Notional Amount $ 339,577
Number of Contracts | contract 15
Fair Value/ Unrealized Gain (Loss) on Open Commodity Contracts $ (76,927)
% of Partners' Capital (1.70%)
Open Commodity Futures Contracts - Long [Member] | United States [Member] | NYMEX Natural Gas Futures NG September 2020 contracts, expiring August 2020  
Notional Amount $ 348,242
Number of Contracts | contract 16
Fair Value/ Unrealized Gain (Loss) on Open Commodity Contracts $ (62,002)
% of Partners' Capital (1.37%)
Open Commodity Futures Contracts - Long [Member] | United States [Member] | NYMEX Natural Gas Futures NG October 2020 contracts, expiring September 2020  
Notional Amount $ 367,164
Number of Contracts | contract 16
Fair Value/ Unrealized Gain (Loss) on Open Commodity Contracts $ (65,244)
% of Partners' Capital (1.44%)
Open Commodity Futures Contracts - Long [Member] | United States [Member] | NYMEX Natural Gas Futures NG November 2020 contracts, expiring October 2020  
Notional Amount $ 360,555
Number of Contracts | contract 15
Fair Value/ Unrealized Gain (Loss) on Open Commodity Contracts $ (18,225)
% of Partners' Capital (0.40%)
Open Commodity Futures Contracts - Long [Member] | United States [Member] | NYMEX Natural Gas Futures NG December 2020 contracts, expiring November 2020  
Notional Amount $ 439,264
Number of Contracts | contract 16
Fair Value/ Unrealized Gain (Loss) on Open Commodity Contracts $ 256
% of Partners' Capital 0.01%
Open Commodity Futures Contracts - Long [Member] | United States [Member] | NYMEX Natural Gas Futures NG January 2021 contracts, expiring December 2020  
Notional Amount $ 443,128
Number of Contracts | contract 16
Fair Value/ Unrealized Gain (Loss) on Open Commodity Contracts $ 18,152
% of Partners' Capital 0.40%
Open Commodity Futures Contracts - Long [Member] | United States [Member] | NYMEX Natural Gas Futures NG February 2021 contracts, expiring January 2021  
Notional Amount $ 441,943
Number of Contracts | contract 16
Fair Value/ Unrealized Gain (Loss) on Open Commodity Contracts $ 13,577
% of Partners' Capital 0.30%
Open Commodity Futures Contracts - Long [Member] | United States [Member] | NYMEX Natural Gas Futures NG March 2021 contracts, expiring February 2021  
Notional Amount $ 387,807
Number of Contracts | contract 15
Fair Value/ Unrealized Gain (Loss) on Open Commodity Contracts $ 23,043
% of Partners' Capital 0.51%
Open Commodity Futures Contracts - Long [Member] | United States [Member] | NYMEX Natural Gas Futures NG April 2021 contracts, expiring March 2021  
Notional Amount $ 369,455
Number of Contracts | contract 16
Fair Value/ Unrealized Gain (Loss) on Open Commodity Contracts $ 26,385
% of Partners' Capital 0.58%
Open Commodity Futures Contracts - Long [Member] | United States [Member] | NYMEX Natural Gas Futures NG May 2021 contracts, expiring April 2021  
Notional Amount $ 396,120
Number of Contracts | contract 16
Fair Value/ Unrealized Gain (Loss) on Open Commodity Contracts $ (5,240)
% of Partners' Capital (0.12%)
Open Commodity Futures Contracts - Long [Member] | United States [Member] | NYMEX Natural Gas Futures NG June 2021 contracts, expiring May 2021  
Notional Amount $ 403,340
Number of Contracts | contract 16
Fair Value/ Unrealized Gain (Loss) on Open Commodity Contracts $ (6,220)
% of Partners' Capital (0.14%)
Open Commodity Futures Contracts - Long [Member] | United States [Member] | NYMEX Natural Gas Futures NG July 2021 contracts, expiring June 2021  
Notional Amount $ 383,855
Number of Contracts | contract 15
Fair Value/ Unrealized Gain (Loss) on Open Commodity Contracts $ (4,655)
% of Partners' Capital (0.10%)
Cash Equivalents [Member]  
Market Value $ 4,339,265
% of Partners' Capital 95.85%
Cash Equivalents [Member] | United States Treasury Obligations [Member]  
Market Value $ 898,919
% of Partners' Capital 19.86%
Cash Equivalents [Member] | United States Money Market Funds [Member]  
Market Value $ 3,440,346
% of Partners' Capital 75.99%
Cash Equivalents [Member] | United States Money Market Funds [Member] | Goldman Sachs Financial Square Funds - Government Fund - Class FS, 0.15% [Member]  
Principal Amount $ 2,650,110
Market Value $ 2,650,110
% of Partners' Capital 58.54%
Cash Equivalents [Member] | United States Money Market Funds [Member] | RBC U.S. Government Money Market Fund - Institutional Share Class, 0.10%  
Principal Amount $ 790,237
Market Value $ 790,236
% of Partners' Capital 17.45%
U.S. Treasury Bills:1.54%, 7/02/2020 [Member] | Cash Equivalents [Member] | United States Treasury Obligations [Member]  
Principal Amount $ 100,000
Market Value $ 99,996
% of Partners' Capital 2.21%
U.S. Treasury Bills:1.52%, 7/09/2020 [Member] | Cash Equivalents [Member] | United States Treasury Obligations [Member]  
Principal Amount $ 100,000
Market Value $ 99,967
% of Partners' Capital 2.21%
U.S. Treasury Bills:1.55%, 7/16/2020 [Member] | Cash Equivalents [Member] | United States Treasury Obligations [Member]  
Principal Amount $ 100,000
Market Value $ 99,936
% of Partners' Capital 2.21%
U.S. Treasury Bills:1.53%, 7/23/2020 [Member] | Cash Equivalents [Member] | United States Treasury Obligations [Member]  
Principal Amount $ 100,000
Market Value $ 99,907
% of Partners' Capital 2.21%
U.S. Treasury Bills:1.54%, 7/30/2020 [Member] | Cash Equivalents [Member] | United States Treasury Obligations [Member]  
Principal Amount $ 100,000
Market Value $ 99,878
% of Partners' Capital 2.21%
U.S. Treasury Bills:1.54%, 8/06/2020 [Member] | Cash Equivalents [Member] | United States Treasury Obligations [Member]  
Principal Amount $ 100,000
Market Value $ 99,848
% of Partners' Capital 2.21%
U.S. Treasury Bills:1.52%, 8/13/2020 [Member] | Cash Equivalents [Member] | United States Treasury Obligations [Member]  
Principal Amount $ 100,000
Market Value $ 99,820
% of Partners' Capital 2.20%
U.S. Treasury Bills:1.53%, 8/20/2020 [Member] | Cash Equivalents [Member] | United States Treasury Obligations [Member]  
Principal Amount $ 100,000
Market Value $ 99,790
% of Partners' Capital 2.20%
U.S. Treasury Bills:1.43%, 8/27/2020 [Member] | Cash Equivalents [Member] | United States Treasury Obligations [Member]  
Principal Amount $ 100,000
Market Value $ 99,777
% of Partners' Capital 2.20%
[1] Collateral amounted to $636,143 on open commodity futures contracts.
[2] Reflects the 7-day yield at June 30, 2020.*