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Statements of Changes in Partners' Capital (USD $) | General Partner [Member] | Limited Partner [Member] | Total
--- | --- | --- | ---
Balances at Dec. 31, 2009 | [1] | $ 20 | $ 980 | $ 1,000
Net asset value, beginning of year at Dec. 31, 2009 | [1] |  |  | $ 50.00
Addition of partnership units |  | 0 | 10,000,000 | 10,000,000
Redemption of initial investment |  | (20) | (980) | (1,000)
Net income |  | 0 | 2,615,031 | 2,615,031
Balances at Dec. 31, 2010 |  | 0 | 12,615,031 | 12,615,031
Net asset value, end of year at Dec. 31, 2010 |  |  |  | $ 63.08
Addition of partnership units |  | 0 | 205,178,034 | 205,178,034
Redemption of initial investment |  | 0 | (186,969,027) | (186,969,027)
Net income |  | 0 | 6,444,350 | 6,444,350
Balances at Dec. 31, 2011 |  | 0 | 37,268,388 | 37,268,388
Net asset value, end of year at Dec. 31, 2011 |  |  |  | $ 74.54
Addition of partnership units |  | 0 | 89,087,948 | 89,087,948
Redemption of initial investment |  | 0 | (85,693,039) | (85,693,039)
Net income |  | 0 | 4,409,324 | 4,409,324
Balances at Dec. 31, 2012 |  | $ 0 | $ 45,072,621 | $ 45,072,621
Net asset value, end of year at Dec. 31, 2012 |  |  |  | $ 81.95
[1] | The commencement of operations of the United States Brent Oil Fund, LP was June 2, 2010.

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