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Schedule of Investments - USD ($) | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Cash Equivalents [Member] | US Treasury Securities [Member] |  |  |
Market Value |  | $ 62,786,902 | $ 61,899,767
% of Partners' Capital |  | 66.41% | 54.77%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,1.12%, 1/04/2018 |  |  |
Principal Amount |  | $ 3,000,000 |
Market Value |  | $ 2,999,721 |
% of Partners' Capital |  | 3.17% |
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,1.11%, 1/11/2018 |  |  |
Principal Amount |  | $ 3,000,000 |
Market Value |  | $ 2,999,079 |
% of Partners' Capital |  | 3.17% |
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,1.10%, 1/18/2018 |  |  |
Principal Amount |  | $ 2,000,000 |
Market Value |  | $ 1,998,971 |
% of Partners' Capital |  | 2.12% |
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,1.12%, 1/25/2018 |  |  |
Principal Amount |  | $ 3,000,000 |
Market Value |  | $ 2,997,770 |
% of Partners' Capital |  | 3.17% |
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,1.12%, 2/01/2018 |  |  |
Principal Amount |  | $ 3,000,000 |
Market Value |  | $ 2,997,120 |
% of Partners' Capital |  | 3.17% |
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,1.13%, 2/08/2018 |  |  |
Principal Amount |  | $ 2,000,000 |
Market Value |  | $ 1,997,625 |
% of Partners' Capital |  | 2.11% |
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,1.12%, 2/15/2018 |  |  |
Principal Amount |  | $ 2,000,000 |
Market Value |  | $ 1,997,225 |
% of Partners' Capital |  | 2.11% |
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,1.10%, 2/22/2018 |  |  |
Principal Amount |  | $ 2,000,000 |
Market Value |  | $ 1,996,851 |
% of Partners' Capital |  | 2.11% |
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,1.09%, 3/01/2018 |  |  |
Principal Amount |  | $ 2,000,000 |
Market Value |  | $ 1,996,444 |
% of Partners' Capital |  | 2.11% |
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,1.14%, 3/08/2018 |  |  |
Principal Amount |  | $ 2,000,000 |
Market Value |  | $ 1,995,847 |
% of Partners' Capital |  | 2.11% |
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,1.14%, 3/15/2018 |  |  |
Principal Amount |  | $ 2,000,000 |
Market Value |  | $ 1,995,417 |
% of Partners' Capital |  | 2.11% |
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,1.16%, 3/22/2018 |  |  |
Principal Amount |  | $ 2,000,000 |
Market Value |  | $ 1,994,889 |
% of Partners' Capital |  | 2.11% |
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,1.17%, 3/29/2018 |  |  |
Principal Amount |  | $ 2,000,000 |
Market Value |  | $ 1,994,393 |
% of Partners' Capital |  | 2.11% |
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,1.19%, 4/05/2018 |  |  |
Principal Amount |  | $ 3,000,000 |
Market Value |  | $ 2,990,718 |
% of Partners' Capital |  | 3.16% |
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,1.22%, 4/12/2018 |  |  |
Principal Amount |  | $ 2,000,000 |
Market Value |  | $ 1,993,182 |
% of Partners' Capital |  | 2.11% |
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,1.23%, 4/19/2018 |  |  |
Principal Amount |  | $ 2,000,000 |
Market Value |  | $ 1,992,695 |
% of Partners' Capital |  | 2.11% |
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,1.25%, 4/26/2018 |  |  |
Principal Amount |  | $ 2,000,000 |
Market Value |  | $ 1,992,078 |
% of Partners' Capital |  | 2.11% |
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,1.27%, 5/03/2018 |  |  |
Principal Amount |  | $ 2,000,000 |
Market Value |  | $ 1,991,460 |
% of Partners' Capital |  | 2.11% |
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,1.32%, 5/10/2018 |  |  |
Principal Amount |  | $ 2,000,000 |
Market Value |  | $ 1,990,612 |
% of Partners' Capital |  | 2.11% |
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,1.37%, 5/17/2018 |  |  |
Principal Amount |  | $ 3,000,000 |
Market Value |  | $ 2,984,615 |
% of Partners' Capital |  | 3.16% |
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,1.43%, 5/24/2018 |  |  |
Principal Amount |  | $ 3,000,000 |
Market Value |  | $ 2,983,138 |
% of Partners' Capital |  | 3.16% |
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,1.43%, 5/31/2018 |  |  |
Principal Amount |  | $ 3,000,000 |
Market Value |  | $ 2,982,250 |
% of Partners' Capital |  | 3.15% |
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,1.45%, 6/07/2018 |  |  |
Principal Amount |  | $ 3,000,000 |
Market Value |  | $ 2,981,160 |
% of Partners' Capital |  | 3.15% |
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,1.46%, 6/14/2018 |  |  |
Principal Amount |  | $ 2,000,000 |
Market Value |  | $ 1,986,834 |
% of Partners' Capital |  | 2.10% |
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,1.49%, 6/21/2018 |  |  |
Principal Amount |  | $ 3,000,000 |
Market Value |  | $ 2,978,910 |
% of Partners' Capital |  | 3.15% |
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,1.50%, 6/28/2018 |  |  |
Principal Amount |  | $ 3,000,000 |
Market Value |  | $ 2,977,898 |
% of Partners' Capital |  | 3.15% |
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.34%, 1/05/2017 |  |  |
Principal Amount |  |  | $ 2,000,000
Market Value |  |  | $ 1,999,924
% of Partners' Capital |  |  | 1.77%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.43%, 1/19/2017 |  |  |
Principal Amount |  |  | $ 1,000,000
Market Value |  |  | $ 999,788
% of Partners' Capital |  |  | 0.88%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.40%, 2/02/2017 |  |  |
Principal Amount |  |  | $ 2,000,000
Market Value |  |  | $ 1,999,289
% of Partners' Capital |  |  | 1.77%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.42%, 2/09/2017 |  |  |
Principal Amount |  |  | $ 2,000,000
Market Value |  |  | $ 1,999,090
% of Partners' Capital |  |  | 1.77%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.45%, 2/16/2017 |  |  |
Principal Amount |  |  | $ 2,000,000
Market Value |  |  | $ 1,998,850
% of Partners' Capital |  |  | 1.77%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.45%, 2/23/2017 |  |  |
Principal Amount |  |  | $ 2,000,000
Market Value |  |  | $ 1,998,690
% of Partners' Capital |  |  | 1.77%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.45%, 3/02/2017 |  |  |
Principal Amount |  |  | $ 2,000,000
Market Value |  |  | $ 1,998,500
% of Partners' Capital |  |  | 1.77%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.47%, 3/09/2017 |  |  |
Principal Amount |  |  | $ 3,000,000
Market Value |  |  | $ 2,997,376
% of Partners' Capital |  |  | 2.65%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.50%, 3/16/2017 |  |  |
Principal Amount |  |  | $ 2,000,000
Market Value |  |  | $ 1,997,934
% of Partners' Capital |  |  | 1.77%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.45%, 3/23/2017 |  |  |
Principal Amount |  |  | $ 3,000,000
Market Value |  |  | $ 2,996,996
% of Partners' Capital |  |  | 2.65%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.43%, 3/30/2017 |  |  |
Principal Amount |  |  | $ 2,000,000
Market Value |  |  | $ 1,997,898
% of Partners' Capital |  |  | 1.77%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.46%, 4/06/2017 |  |  |
Principal Amount |  |  | $ 3,000,000
Market Value |  |  | $ 2,996,398
% of Partners' Capital |  |  | 2.65%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.47%, 4/13/2017 |  |  |
Principal Amount |  |  | $ 3,000,000
Market Value |  |  | $ 2,996,005
% of Partners' Capital |  |  | 2.65%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.46%, 4/20/2017 |  |  |
Principal Amount |  |  | $ 3,000,000
Market Value |  |  | $ 2,995,867
% of Partners' Capital |  |  | 2.65%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.47%, 4/27/2017 |  |  |
Principal Amount |  |  | $ 3,000,000
Market Value |  |  | $ 2,995,505
% of Partners' Capital |  |  | 2.65%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.49%, 5/04/2017 |  |  |
Principal Amount |  |  | $ 3,000,000
Market Value |  |  | $ 2,994,952
% of Partners' Capital |  |  | 2.65%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.55%, 5/11/2017 |  |  |
Principal Amount |  |  | $ 2,000,000
Market Value |  |  | $ 1,996,064
% of Partners' Capital |  |  | 1.76%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.60%, 5/18/2017 |  |  |
Principal Amount |  |  | $ 3,000,000
Market Value |  |  | $ 2,993,207
% of Partners' Capital |  |  | 2.65%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.61%, 5/25/2017 |  |  |
Principal Amount |  |  | $ 3,000,000
Market Value |  |  | $ 2,992,710
% of Partners' Capital |  |  | 2.65%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.60%, 6/01/2017 |  |  |
Principal Amount |  |  | $ 3,000,000
Market Value |  |  | $ 2,992,513
% of Partners' Capital |  |  | 2.65%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.62%, 6/08/2017 |  |  |
Principal Amount |  |  | $ 4,000,000
Market Value |  |  | $ 3,989,203
% of Partners' Capital |  |  | 3.53%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.65%, 6/15/2017 |  |  |
Principal Amount |  |  | $ 3,000,000
Market Value |  |  | $ 2,991,131
% of Partners' Capital |  |  | 2.65%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.64%, 6/22/2017 |  |  |
Principal Amount |  |  | $ 3,000,000
Market Value |  |  | $ 2,990,827
% of Partners' Capital |  |  | 2.64%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.60%, 6/29/2017 |  |  |
Principal Amount |  |  | $ 3,000,000
Market Value |  |  | $ 2,991,050
% of Partners' Capital |  |  | 2.65%
Cash Equivalents [Member] | United States [Member] |  |  |
Market Value |  | $ 82,786,902 | $ 96,899,767
% of Partners' Capital |  | 87.56% | 85.73%
Cash Equivalents [Member] | United States [Member] | Money Market Funds [Member] |  |  |
Market Value |  | $ 20,000,000 | $ 35,000,000
% of Partners' Capital |  | 21.15% | 30.96%
Cash Equivalents [Member] | United States [Member] | Money Market Funds [Member] | Fidelity Investments Money Market Funds - Government Portfolio [Member] |  |  |
Principal Amount |  | $ 12,000,000 | $ 16,000,000
Market Value |  | $ 12,000,000 | $ 16,000,000
% of Partners' Capital |  | 12.69% | 14.15%
Cash Equivalents [Member] | United States [Member] | Money Market Funds [Member] | Goldman Sachs Financial Square Funds - Government Fund - Class FS [Member] |  |  |
Principal Amount |  | $ 3,000,000 | $ 12,000,000
Market Value |  | $ 3,000,000 | $ 12,000,000
% of Partners' Capital |  | 3.17% | 10.62%
Cash Equivalents [Member] | United States [Member] | Money Market Funds [Member] | Morgan Stanley Institutional Liquidity Funds - Government Portfolio [Member] |  |  |
Principal Amount |  | $ 5,000,000 | $ 7,000,000
Market Value |  | $ 5,000,000 | $ 7,000,000
% of Partners' Capital |  | 5.29% | 6.19%
Open Futures Contracts - Long [Member] | Foreign Contracts [Member] | ICE Brent Crude Oil Futures CO March 2017 contracts, expiring January 2017 [Member] |  |  |
Principal Amount | [1] |  | $ 110,682,100
Number of Contracts | [1] |  | 1,989
Value/Unrealized Gain (Loss) on Open Commodity Contracts | [1] |  | $ 2,332,880
% of Partners' Capital | [1] |  | 2.06%
Open Futures Contracts - Long [Member] | Foreign Contracts [Member] | ICE Brent Crude Oil Futures CO March 2018 contracts, expiring January 2018 [Member] |  |  |
Principal Amount | [2] | $ 88,966,270 |
Number of Contracts | [2] | 1,414 |
Value/Unrealized Gain (Loss) on Open Commodity Contracts | [2] | $ 5,587,910 |
% of Partners' Capital | [2] | 5.91% |
[1] | Collateral amounted to $8,297,821 on open futures contracts.
[2] | Collateral amounted to $14,167,416 on open futures contracts.

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