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Schedule of Investments
Dec. 31, 2016
USD ($)
Contracts
Dec. 31, 2015
USD ($)
Contracts
Cash Equivalents [Member] | US Treasury Securities [Member]    
Market Value $ 61,899,767 $ 61,945,289
% of Partners' Capital 54.77% 75.09%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.34%, 01/05/2017    
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] | US Treasury Securities [Member] | U.S. Treasury Bills,0.11%, 1/14/2016    
Principal Amount   $ 2,000,000
Market Value   $ 1,999,922
% of Partners' Capital   2.42%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.13%, 1/21/2016    
Principal Amount   $ 2,000,000
Market Value   $ 1,999,861
% of Partners' Capital   2.42%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.15%, 1/28/2016    
Principal Amount   $ 3,000,000
Market Value   $ 2,999,674
% of Partners' Capital   3.64%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.19%, 2/04/2016    
Principal Amount   $ 1,000,000
Market Value   $ 999,825
% of Partners' Capital   1.21%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.22%, 2/11/2016    
Principal Amount   $ 2,000,000
Market Value   $ 1,999,510
% of Partners' Capital   2.42%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.20%, 2/18/2016    
Principal Amount   $ 3,000,000
Market Value   $ 2,999,200
% of Partners' Capital   3.64%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.23%, 3/03/2016    
Principal Amount   $ 2,000,000
Market Value   $ 1,999,216
% of Partners' Capital   2.42%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.26%, 3/10/2016    
Principal Amount   $ 3,000,000
Market Value   $ 2,998,534
% of Partners' Capital   3.64%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.24%, 3/17/2016    
Principal Amount   $ 3,000,000
Market Value   $ 2,998,480
% of Partners' Capital   3.63%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.09%, 3/24/2016    
Principal Amount   $ 3,000,000
Market Value   $ 2,999,412
% of Partners' Capital   3.64%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.07%, 3/31/2016    
Principal Amount   $ 3,000,000
Market Value   $ 2,999,512
% of Partners' Capital   3.64%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.07%, 4/07/2016    
Principal Amount   $ 3,000,000
Market Value   $ 2,999,434
% of Partners' Capital   3.64%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.07%, 4/14/2016    
Principal Amount   $ 3,000,000
Market Value   $ 2,999,437
% of Partners' Capital   3.64%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.11%, 4/21/2016    
Principal Amount   $ 2,000,000
Market Value   $ 1,999,322
% of Partners' Capital   2.42%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.21%, 4/28/2016    
Principal Amount   $ 2,000,000
Market Value   $ 1,998,623
% of Partners' Capital   2.42%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.26%, 5/05/2016    
Principal Amount   $ 3,000,000
Market Value   $ 2,997,292
% of Partners' Capital   3.63%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.33%, 5/12/2016    
Principal Amount   $ 2,000,000
Market Value   $ 1,997,580
% of Partners' Capital   2.42%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.31%, 5/19/2016    
Principal Amount   $ 2,000,000
Market Value   $ 1,997,606
% of Partners' Capital   2.42%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.35%, 5/26/2016    
Principal Amount   $ 3,000,000
Market Value   $ 2,995,742
% of Partners' Capital   3.63%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.43%, 6/02/2016    
Principal Amount   $ 3,000,000
Market Value   $ 2,994,581
% of Partners' Capital   3.63%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.52%, 6/09/2016    
Principal Amount   $ 3,000,000
Market Value   $ 2,993,067
% of Partners' Capital   3.63%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.48%, 6/16/2016    
Principal Amount   $ 2,000,000
Market Value   $ 1,995,547
% of Partners' Capital   2.42%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.46%, 6/23/2016    
Principal Amount   $ 2,000,000
Market Value   $ 1,995,602
% of Partners' Capital   2.42%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.47%, 6/30/2016    
Principal Amount   $ 5,000,000
Market Value   $ 4,988,310
% of Partners' Capital   6.05%
Cash Equivalents [Member] | United States [Member]    
Market Value $ 96,899,767 $ 64,945,289
% of Partners' Capital 85.73% 78.73%
Cash Equivalents [Member] | United States [Member] | Money Market Funds [Member]    
Market Value $ 35,000,000 $ 3,000,000
% of Partners' Capital 30.96% 3.64%
Cash Equivalents [Member] | United States [Member] | Money Market Funds [Member] | Fidelity Investments Money Market Funds - Government Portfolio [Member]    
Principal Amount $ 16,000,000  
Market Value $ 16,000,000  
% of Partners' Capital 14.15%  
Cash Equivalents [Member] | United States [Member] | Money Market Funds [Member] | Goldman Sachs Financial Square Funds - Government Fund - Class FS [Member]    
Principal Amount $ 12,000,000 $ 2,000,000
Market Value $ 12,000,000 $ 2,000,000
% of Partners' Capital 10.62% 2.43%
Cash Equivalents [Member] | United States [Member] | Money Market Funds [Member] | Morgan Stanley Institutional Liquidity Funds Government Portfolio [Member]    
Principal Amount $ 7,000,000 $ 1,000,000
Market Value $ 7,000,000 $ 1,000,000
% of Partners' Capital 6.19% 1.21%
Open Futures Contracts - Long [Member] | United States [Member]    
Number of Contracts | Contracts [1]   2,207
Unrealized Gain (Loss) on Open Commodity Contracts [1]   $ (7,442,340)
% of Partners' Capital [1]   (9.02%)
Open Futures Contracts - Long [Member] | United States [Member] | ICE Brent Crude Oil Futures CO February 2016 contracts, expiring January 2016 [Member]    
Number of Contracts | Contracts   1,660
Unrealized Gain (Loss) on Open Commodity Contracts   $ (7,442,340)
% of Partners' Capital   (9.02%)
Open Futures Contracts - Long [Member] | United States [Member] | ICE Brent Crude Oil Futures CO March 2016 contracts, expiring January 2016 [Member]    
Number of Contracts | Contracts   547
Unrealized Gain (Loss) on Open Commodity Contracts   $ 0.00
% of Partners' Capital [2]   0.00%
Open Futures Contracts - Long [Member] | United States [Member] | Ice Brent Crude Oil Futures Co March 2017 Contracts Expiring January 2017 [Member]    
Number of Contracts | Contracts [3] 1,989  
Unrealized Gain (Loss) on Open Commodity Contracts [3] $ 2,332,880  
% of Partners' Capital [3] 2.06%  
[1] Collateral amounted to $20,732,135 on open futures contracts.
[2] Represents less than 0.005%.
[3] Collateral amounted to $8,297,821 on open futures contracts.