Statements of Income and Expenses (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Income
Interest Income	$ 2,580,166	$ 892,403
Dividends from Affiliates	141,799
Total Income	2,721,965	892,403
Expenses
Management Fee	5,161,737	3,973,287
Brokerage Commissions and Fees	92,283	120,135
Interest Expense	28,061	96,887
Total Expenses	5,282,081	4,190,309
Less: Waivers	(93,650)
Net Expenses	5,188,431	4,190,309
Net Investment Income (Loss)	(2,466,466)	(3,297,906)
Net Realized Gain (Loss) on
United States Treasury Obligations	(29,664)	631
Commodity Futures Contracts	62,190,192	(199,193,372)
Net Realized Gain (Loss)	62,160,528	(199,192,741)
Net Change in Unrealized Gain (Loss) on
United States Treasury Obligations	(116,229)	178,110
Affiliated Investments	84,458
Commodity Futures Contracts	(158,868,688)	189,535,723
Net Change in Unrealized Gain (Loss)	(158,900,459)	189,713,833
Net Realized and Net Change in Unrealized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Commodity Futures Contracts	(96,739,931)	(9,478,908)
Net Income (Loss)	$ (99,206,397)	$ (12,776,814)