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Condensed Schedule of Investments
Sep. 30, 2016
USD ($)
Number
United State [Member] | Money Market Funds [Member]  
Market Values $ 5,000,000
% of Partners' Capital 35.24%
United State [Member] | Fidelity Institutional Money Market Funds - Government Portfolio [Member] | Money Market Funds [Member]  
Principal Amount $ 2,000,000
Market Values $ 2,000,000
% of Partners' Capital 14.09%
United State [Member] | Goldman Sachs Financial Square Funds - Government Fund - Class FS [Member] | Money Market Funds [Member]  
Principal Amount $ 1,000,000
Market Values $ 1,000,000
% of Partners' Capital 7.06%
United State [Member] | Morgan Stanley Institutional Liquidity Funds - Government Portfolio [Member] | Money Market Funds [Member]  
Principal Amount $ 2,000,000
Market Values $ 2,000,000
% of Partners' Capital 14.09%
Cash Equivalents [Member] | US Treasury Securities [Member]  
Market Values $ 6,592,470
% of Partners' Capital 46.46%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills: 0.39%, 10/27/2016  
Principal Amount $ 400,000
Market Values $ 399,887
% of Partners' Capital 2.82%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills: 0.37%, 11/03/2016  
Principal Amount $ 200,000
Market Values $ 199,932
% of Partners' Capital 1.41%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills: 0.39%, 11/17/2016  
Principal Amount $ 500,000
Market Values $ 499,745
% of Partners' Capital 3.52%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills: 0.47%, 12/01/2016  
Principal Amount $ 500,000
Market Values $ 499,606
% of Partners' Capital 3.52%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills: 0.41%, 12/08/2016  
Principal Amount $ 500,000
Market Values $ 499,613
% of Partners' Capital 3.52%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills: 0.34%, 12/15/2016  
Principal Amount $ 500,000
Market Values $ 499,646
% of Partners' Capital 3.52%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills: 0.34%, 12/29/2016  
Principal Amount $ 500,000
Market Values $ 499,586
% of Partners' Capital 3.52%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills: 0.34%, 1/05/2017  
Principal Amount $ 400,000
Market Values $ 399,637
% of Partners' Capital 2.81%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills: 0.43%, 1/19/2017  
Principal Amount $ 500,000
Market Values $ 499,351
% of Partners' Capital 3.52%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills: 0.36%, 1/26/2017  
Principal Amount $ 500,000
Market Values $ 499,415
% of Partners' Capital 3.52%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills: 0.40%, 2/02/2017  
Principal Amount $ 200,000
Market Values $ 199,724
% of Partners' Capital 1.41%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills: 0.42%, 2/09/2017  
Principal Amount $ 300,000
Market Values $ 299,541
% of Partners' Capital 2.11%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills: 0.45%, 2/16/2017  
Principal Amount $ 200,000
Market Values $ 199,655
% of Partners' Capital 1.41%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills: 0.45%, 2/23/2017  
Principal Amount $ 300,000
Market Values $ 299,462
% of Partners' Capital 2.11%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills: 0.45%, 3/02/2017  
Principal Amount $ 200,000
Market Values $ 199,620
% of Partners' Capital 1.41%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills: 0.47%, 3/09/2017  
Principal Amount $ 200,000
Market Values $ 199,585
% of Partners' Capital 1.41%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills: 0.50%, 3/16/2017  
Principal Amount $ 200,000
Market Values $ 199,537
% of Partners' Capital 1.40%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills: 0.45%, 3/23/2017  
Principal Amount $ 300,000
Market Values $ 299,358
% of Partners' Capital 2.11%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills: 0.43%, 3/30/2017  
Principal Amount $ 200,000
Market Values $ 199,570
% of Partners' Capital 1.41%
Cash Equivalents [Member] | United State [Member]  
Market Values $ 11,592,470
% of Partners' Capital 81.70%
Open Futures Contracts, Long [Member] | United State [Member]  
Number of Contracts | Number 462 [1]
Unrealized Gain (Loss) on Open Commodity Contracts $ 1,003,879 [1]
% of Partners' Capital 7.07% [1]
Open Futures Contracts, Long [Member] | United State [Member] | NYMEX Natural Gas Futures NG November 2016 contracts, expiring October 2016  
Number of Contracts | Number 39
Unrealized Gain (Loss) on Open Commodity Contracts $ 11,068
% of Partners' Capital 0.08%
Open Futures Contracts, Long [Member] | United State [Member] | NYMEX Natural Gas Futures NG December 2016 contracts, expiring November 2016  
Number of Contracts | Number 38
Unrealized Gain (Loss) on Open Commodity Contracts $ 100,515
% of Partners' Capital 0.71%
Open Futures Contracts, Long [Member] | United State [Member] | NYMEX Natural Gas Futures NG January 2017 contracts, expiring December 2016  
Number of Contracts | Number 39
Unrealized Gain (Loss) on Open Commodity Contracts $ 227,997
% of Partners' Capital 1.61%
Open Futures Contracts, Long [Member] | United State [Member] | NYMEX Natural Gas Futures NG February 2017 contracts, expiring January 2017  
Number of Contracts | Number 38
Unrealized Gain (Loss) on Open Commodity Contracts $ 154,899
% of Partners' Capital 1.09%
Open Futures Contracts, Long [Member] | United State [Member] | NYMEX Natural Gas Futures NG March 2017 contracts, expiring February 2017  
Number of Contracts | Number 39
Unrealized Gain (Loss) on Open Commodity Contracts $ 202,536
% of Partners' Capital 1.43%
Open Futures Contracts, Long [Member] | United State [Member] | NYMEX Natural Gas Futures NG April 2017 contracts, expiring March 2017  
Number of Contracts | Number 38
Unrealized Gain (Loss) on Open Commodity Contracts $ 159,500
% of Partners' Capital 1.12%
Open Futures Contracts, Long [Member] | United State [Member] | NYMEX Natural Gas Futures NG May 2017 contracts, expiring April 2017  
Number of Contracts | Number 39
Unrealized Gain (Loss) on Open Commodity Contracts $ 104,055
% of Partners' Capital 0.73%
Open Futures Contracts, Long [Member] | United State [Member] | NYMEX Natural Gas Futures NG June 2017 contracts, expiring May 2017  
Number of Contracts | Number 38
Unrealized Gain (Loss) on Open Commodity Contracts $ 57,905
% of Partners' Capital 0.41%
Open Futures Contracts, Long [Member] | United State [Member] | NYMEX Natural Gas Futures NG July 2017 contracts, expiring June 2017  
Number of Contracts | Number 39
Unrealized Gain (Loss) on Open Commodity Contracts $ 10,559
% of Partners' Capital 0.07%
Open Futures Contracts, Long [Member] | United State [Member] | NYMEX Natural Gas Futures NG August 2017 contracts, expiring July 2017  
Number of Contracts | Number 38
Unrealized Gain (Loss) on Open Commodity Contracts $ (29,045)
% of Partners' Capital (0.20%)
Open Futures Contracts, Long [Member] | United State [Member] | NYMEX Natural Gas Futures NG September 2017 contracts, expiring August 2017  
Number of Contracts | Number 39
Unrealized Gain (Loss) on Open Commodity Contracts $ 18,770
% of Partners' Capital 0.13%
Open Futures Contracts, Long [Member] | United State [Member] | NYMEX Natural Gas Futures NG October 2017 contracts, expiring September 2017  
Number of Contracts | Number 38
Unrealized Gain (Loss) on Open Commodity Contracts $ (14,880)
% of Partners' Capital (0.11%)
[1] Collateral amounted to $263,127 on open futures contracts.