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Condensed Statements of Cash Flows (USD $)	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Cash Flows from Operating Activities:
Net income (loss)	$ (16,873,971)	$ 5,874,040
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
(Increase) decrease in commodity futures trading account - cash and cash equivalents	16,146,847	(18,376,365)
Unrealized loss on futures contracts	12,464,380	14,501,200
(Increase) decrease in dividend receivable	(293)	2,439
Decrease in interest receivable	14
(Increase) decrease in other assets	(1,360)	1,317
(Increase) decrease in investment payable	(33)	149
Decrease in professional fees payable	(125,561)	(19,896)
Increase (decrease) in General Partner management fees payable	(36,583)	26,819
Increase (decrease) in brokerage commissions payable	(1,600)	980
Increase (decrease) in other liabilities	(3,087)	7,944
Net cash provided by operating activities	11,568,753	2,018,627
Cash Flows from Financing Activities:
Addition of partnership units	47,908,837	98,271,913
Redemption of partnership units	(88,828,511)	(65,571,808)
Net cash provided by (used in) financing activities	(40,919,674)	32,700,105
Net Increase (Decrease) in Cash and Cash Equivalents	(29,350,921)	34,718,732
Cash and Cash Equivalents, beginning of period	123,736,412	152,952,590
Cash and Cash Equivalents, end of period	$ 94,385,491	$ 187,671,322

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