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Condensed Schedule of Investments (USD $)
Sep. 30, 2013
Cash Equivalents [Member]
  
% of Partners' Capital 78.31%
Market Values $ 28,215,603
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bill [Member]
  
% of Partners' Capital 6.10%
Principal Amount 2,200,000
Market Values 2,199,813
Cash Equivalents [Member] | United States [Member] | Money Market Funds [Member]
  
% of Partners' Capital 72.21%
Market Values 26,015,790
Cash Equivalents [Member] | United States [Member] | Money Market Funds [Member] | Fidelity Institutional Government Portfolio - Class I [Member]
  
% of Partners' Capital 1.39%
Principal Amount 502,749
Market Values 502,749
Cash Equivalents [Member] | United States [Member] | Money Market Funds [Member] | Goldman Sachs Financial Square Funds - Government Fund - Class FS [Member]
  
% of Partners' Capital 11.11%
Principal Amount 4,002,270
Market Values 4,002,270
Cash Equivalents [Member] | United States [Member] | Money Market Funds [Member] | Morgan Stanley Institutional Liquidity Fund - Government Portfolio [Member]
  
% of Partners' Capital 31.95%
Principal Amount 11,510,274
Market Values 11,510,274
Cash Equivalents [Member] | United States [Member] | Money Market Funds [Member] | Wells Fargo Advantage Government Money Market Fund - Class I [Member]
  
% of Partners' Capital 27.76%
Principal Amount 10,000,497
Market Values 10,000,497
Open Futures Contracts - Long [Member] | United States [Member] | ICE Brent Crude Oil Futures CO November 2013 contracts, expiring October 2013
  
Number of Contracts 333 [1]
Unrealized Gain Loss On Open Commodity Contracts $ (1,639,350) [1]
% of Partners' Capital (4.55%) [1]
[1] Collateral amounted to $3,989,981 on open futures contracts.