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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 (loss)	$ 5,874,040	$ (13,472,574)
Adjustments to reconcile net income (loss) to cash provided by (used in) operating activities:
Decrease in commodity futures trading account - cash	(18,376,365)	(20,524,841)
Unrealized loss on futures contracts	14,501,200	27,276,150
Decrease in dividend receivable and other assets	3,756	888
Increase in investment payable	149
Increase (decrease) in professional fees payable	(19,896)	27,122
Increase (decrease) in General Partner management fees payable	26,819	(2,390)
Increase (decrease) in brokerage commissions payable	980	(4,250)
Increase in other liabilities	7,944	821
Net cash provided by (used in) operating activities	2,018,627	(6,699,074)
Cash Flows from Financing Activities:
Addition of partnership units	98,271,913	14,577,236
Redemption of partnership units	(65,571,808)	(12,081,444)
Net cash provided by financing activities	32,700,105	2,495,792
Net Increase (Decrease) in Cash and Cash Equivalents	34,718,732	(4,203,282)
Cash and Cash Equivalents, beginning of period	152,952,590	141,666,539
Cash and Cash Equivalents, end of period	$ 187,671,322	$ 137,463,257

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