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Condensed Statements of Operations (USD $) | 3 Months Ended
--- | ---
Mar. 31, 2013 | Mar. 31, 2012
Gain on trading of commodity futures contracts: |  |
Realized gain on closed positions | $ 1,165,190 | $ 2,158,700
Change in unrealized gain on open positions | 2,312,560 | 7,301,720
Dividend income | 5,612 | 6,102
Interest income | 2,195 | 2,232
Other income | 2,450 | 3,150
Total income | 3,488,007 | 9,471,904
Expenses |  |
General Partner management fees (Note 3) | 153,776 | 255,887
Professional fees | 50,818 | 38,135
Registration fees | 29,362 | 2,366
Brokerage commissions | 3,982 | 4,890
Other expenses | 9,157 | 14,438
Total expenses | 247,095 | 315,716
Net income | $ 3,240,912 | $ 9,156,188
Net income per limited partnership unit | 1.22 | 2.35
Net income per weighted average limited partnership unit | 1.26 | 2.43
Weighted average limited partnership units outstanding | 2,567,222 | 3,760,440

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