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Condensed Statements of Cash Flows (USD $)
 6 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Cash Flows from Operating Activities:    
Net income $ 4,870,578 $ 194,975
Adjustments to reconcile net income to cash provided by (used in) operating activities:    
Increase in commodity futures trading account - cash (4,084,930) (743,639)
Unrealized (gain) loss on futures contracts 936,770 (95,980)
(Increase) decrease in receivable from General Partner 37,809 (10,438)
Increase in dividend receivable and other assets (1,034) (287)
Increase in investment payable 40  
Increase (decrease) in professional fees payable (20,348) 11,300
Increase in General Partner management fees payable 18,537 6,164
Increase in brokerage commissions payable 830 440
Increase in other liabilities 705 45
Net cash provided by (used in) operating activities 1,758,957 (637,420)
Cash Flows from Financing Activities:    
Addition of partnership units 74,125,512 10,000,000
Redemption of partnership units (39,061,086) (1,000)
Net cash provided by financing activities 35,064,426 9,999,000
Net Increase in Cash and Cash Equivalents 36,823,383 9,361,580
Cash and Cash Equivalents, beginning of period 9,140,476 1,000
Cash and Cash Equivalents, end of period $ 45,963,859 $ 9,362,580