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Condensed Schedule of Investments
Sep. 30, 2018
USD ($)
Open Futures Contracts - Long [Member] | United States Contracts [Member]  
Notional Amount $ 5,188,130 [1]
Number of Contracts 184 [1]
Value/ Unrealized Gain (Loss) on Open Commodity Contracts $ 6,200 [1]
% of Partners' Capital 0.12% [1]
Open Futures Contracts - Long [Member] | United States Contracts [Member] | NYMEX Natural Gas Futures NG November 2018 contracts, expiring October 2018  
Notional Amount $ 486,140
Number of Contracts 16
Value/ Unrealized Gain (Loss) on Open Commodity Contracts $ (4,860)
% of Partners' Capital (0.09%)
Open Futures Contracts - Long [Member] | United States Contracts [Member] | NYMEX Natural Gas Futures NG December 2018 contracts, expiring November 2018  
Notional Amount $ 477,359
Number of Contracts 15
Value/ Unrealized Gain (Loss) on Open Commodity Contracts $ (13,709)
% of Partners' Capital (0.26%)
Open Futures Contracts - Long [Member] | United States Contracts [Member] | NYMEX Natural Gas Futures NG January 2019 contracts, expiring December 2018  
Notional Amount $ 454,862
Number of Contracts 15
Value/ Unrealized Gain (Loss) on Open Commodity Contracts $ 20,488
% of Partners' Capital 0.39%
Open Futures Contracts - Long [Member] | United States Contracts [Member] | NYMEX Natural Gas Futures NG February 2019 contracts, expiring January 2019  
Notional Amount $ 490,610
Number of Contracts 16
Value/ Unrealized Gain (Loss) on Open Commodity Contracts $ 2,990
% of Partners' Capital 0.06%
Open Futures Contracts - Long [Member] | United States Contracts [Member] | NYMEX Natural Gas Futures NG March 2019 contracts, expiring February 2019  
Notional Amount $ 434,253
Number of Contracts 15
Value/ Unrealized Gain (Loss) on Open Commodity Contracts $ 4,197
% of Partners' Capital 0.08%
Open Futures Contracts - Long [Member] | United States Contracts [Member] | NYMEX Natural Gas Futures NG April 2019 contracts, expiring March 2019  
Notional Amount $ 406,514
Number of Contracts 15
Value/ Unrealized Gain (Loss) on Open Commodity Contracts $ (9,614)
% of Partners' Capital (0.19%)
Open Futures Contracts - Long [Member] | United States Contracts [Member] | NYMEX Natural Gas Futures NG May 2019 contracts, expiring April 2019  
Notional Amount $ 421,943
Number of Contracts 16
Value/ Unrealized Gain (Loss) on Open Commodity Contracts $ (3,863)
% of Partners' Capital (0.07%)
Open Futures Contracts - Long [Member] | United States Contracts [Member] | NYMEX Natural Gas Futures NG June 2019 contracts, expiring May 2019  
Notional Amount $ 386,233
Number of Contracts 15
Value/ Unrealized Gain (Loss) on Open Commodity Contracts $ 10,217
% of Partners' Capital 0.20%
Open Futures Contracts - Long [Member] | United States Contracts [Member] | NYMEX Natural Gas Futures NG July 2019 contracts, expiring June 2019  
Notional Amount $ 401,408
Number of Contracts 15
Value/ Unrealized Gain (Loss) on Open Commodity Contracts $ (158)
% of Partners' Capital 0.00% [2]
Open Futures Contracts - Long [Member] | United States Contracts [Member] | NYMEX Natural Gas Futures NG August 2019 contracts, expiring July 2019  
Notional Amount $ 424,116
Number of Contracts 16
Value/ Unrealized Gain (Loss) on Open Commodity Contracts $ 4,204
% of Partners' Capital 0.08%
Open Futures Contracts - Long [Member] | United States Contracts [Member] | NYMEX Natural Gas Futures NG September 2019 contracts, expiring August 2019  
Notional Amount $ 407,042
Number of Contracts 15
Value/ Unrealized Gain (Loss) on Open Commodity Contracts $ (8,042)
% of Partners' Capital (0.16%)
Open Futures Contracts - Long [Member] | United States Contracts [Member] | NYMEX Natural Gas Futures NG October 2019 contracts, expiring September 2019  
Notional Amount $ 397,650
Number of Contracts 15
Value/ Unrealized Gain (Loss) on Open Commodity Contracts $ 4,350
% of Partners' Capital 0.08%
Cash Equivalents [Member]  
Market Value $ 5,076,846
% of Partners' Capital 97.68%
Cash Equivalents [Member] | United States Treasury Obligations [Member]  
Market Value $ 4,076,846
% of Partners' Capital 78.44%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills: 1.87%, 10/04/2018 [Member]  
Principal Amount $ 200,000
Market Value $ 199,969
% of Partners' Capital 3.85%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills: 1.97%, 10/18/2018 [Member]  
Principal Amount $ 100,000
Market Value $ 99,908
% of Partners' Capital 1.92%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills: 2.00%, 10/25/2018 [Member]  
Principal Amount $ 100,000
Market Value $ 99,868
% of Partners' Capital 1.92%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills: 2.00%, 11/01/2018 [Member]  
Principal Amount $ 100,000
Market Value $ 99,830
% of Partners' Capital 1.92%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills: 2.03%, 11/08/2018 [Member]  
Principal Amount $ 200,000
Market Value $ 199,577
% of Partners' Capital 3.84%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills: 2.05%, 11/15/2018 [Member]  
Principal Amount $ 100,000
Market Value $ 99,746
% of Partners' Capital 1.92%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills: 2.07%, 11/23/2018 [Member]  
Principal Amount $ 200,000
Market Value $ 199,396
% of Partners' Capital 3.84%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills: 2.05%, 11/29/2018 [Member]  
Principal Amount $ 100,000
Market Value $ 99,668
% of Partners' Capital 1.92%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills: 2.09%, 12/06/2018 [Member]  
Principal Amount $ 200,000
Market Value $ 199,241
% of Partners' Capital 3.83%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills:2.06%, 12/13/2018 [Member]  
Principal Amount $ 200,000
Market Value $ 199,173
% of Partners' Capital 3.83%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills: 2.09%, 12/20/2018 [Member]  
Principal Amount $ 200,000
Market Value $ 199,080
% of Partners' Capital 3.83%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills: 2.07%, 12/27/2018 [Member]  
Principal Amount $ 200,000
Market Value $ 199,009
% of Partners' Capital 3.83%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills: 2.10%, 1/03/2019 [Member]  
Principal Amount $ 200,000
Market Value $ 198,916
% of Partners' Capital 3.83%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills: 2.10%, 1/10/2019 [Member]  
Principal Amount $ 200,000
Market Value $ 198,833
% of Partners' Capital 3.83%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills: 2.13%, 1/17/2019 [Member]  
Principal Amount $ 200,000
Market Value $ 198,734
% of Partners' Capital 3.82%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills: 2.15%, 1/24/2019 [Member]  
Principal Amount $ 200,000
Market Value $ 198,642
% of Partners' Capital 3.82%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills: 2.18%, 1/31/2019 [Member]  
Principal Amount $ 200,000
Market Value $ 198,539
% of Partners' Capital 3.82%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills: 2.20%, 2/07/2019 [Member]  
Principal Amount $ 200,000
Market Value $ 198,441
% of Partners' Capital 3.82%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills: 2.19%, 2/14/2019 [Member]  
Principal Amount $ 200,000
Market Value $ 198,361
% of Partners' Capital 3.82%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills: 2.20%, 2/21/2019 [Member]  
Principal Amount $ 200,000
Market Value $ 198,268
% of Partners' Capital 3.82%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills: 2.24%, 2/28/2019 [Member]  
Principal Amount $ 100,000
Market Value $ 99,077
% of Partners' Capital 1.91%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills: 2.38%, 3/07/2019 [Member]  
Principal Amount $ 100,000
Market Value $ 98,973
% of Partners' Capital 1.90%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills: 2.28%, 3/14/2019 [Member]  
Principal Amount $ 100,000
Market Value $ 98,973
% of Partners' Capital 1.90%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills: 2.33%, 3/21/2019 [Member]  
Principal Amount $ 100,000
Market Value $ 98,908
% of Partners' Capital 1.90%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills: 2.34%, 3/28/2019 [Member]  
Principal Amount $ 200,000
Market Value $ 197,716
% of Partners' Capital 3.80%
Cash Equivalents [Member] | United States - Money Market Funds [Member]  
Market Value $ 1,000,000
% of Partners' Capital 19.24%
Cash Equivalents [Member] | United States - Money Market Funds [Member] | Goldman Sachs Financial Square Funds - Government Fund - Class FS [Member]  
Principal Amount $ 900,000
Market Value $ 900,000
% of Partners' Capital 17.32%
Cash Equivalents [Member] | United States - Money Market Funds [Member] | Morgan Stanley Institutional Liquidity Funds - Government Portfolio [Member]  
Principal Amount $ 100,000
Market Value $ 100,000
% of Partners' Capital 1.92%
[1] Collateral amounted to $262,249 on open futures contracts.
[2] Represents less than 0.005%.