Unaudited Statements of Income and Expenses (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Income
Interest Income	$ 29,104	$ 34,313	$ 62,787	$ 66,631
Expenses
Management Fee	609,375	410,476	1,089,155	724,372
Brokerage Commissions and Fees	22,375	21,119	32,566	39,674
Total Expenses	631,750	431,595	1,121,721	764,046
Net investment income (loss)	(602,646)	(397,282)	(1,058,934)	(697,415)
Net Realized Gain (Loss) on
United States Treasury Obligations	63	3,651	476	3,745
Futures	5,906,143	(210,017)	10,294,633	311,881
Net realized gain (loss)	5,906,206	(206,366)	10,295,109	315,626
Net Change in Unrealized Gain (Loss) on
United States Treasury Obligations	(4,340)	(2,520)	(2,829)	(971)
Futures	11,470,118	(16,179,726)	7,895,409	(9,747,415)
Net change in unrealized gain (loss)	11,465,778	(16,182,246)	7,892,580	(9,748,386)
Net realized and net change in unrealized gain (loss) on United States Treasury Obligations and Futures	17,371,984	(16,388,612)	18,187,689	(9,432,760)
Net Income (Loss)	$ 16,769,338	$ (16,785,894)	$ 17,128,755	$ (10,130,175)