Statements of Income and Expenses (Unaudited) - USD ($)		3 Months Ended		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Income
Interest Income		$ 1,493,090	$ 69,463	$ 2,385,493	$ 295,423
Expenses
Management Fee		4,814,098	6,633,351	8,787,385	14,121,917
Brokerage Commissions and Fees		155,543	217,876	275,678	593,882
Interest Expense	[1]	7,358		104,245
Total Expenses		4,976,999	6,851,227	9,167,308	14,715,799
Net Investment Income (Loss)		(3,483,909)	(6,781,764)	(6,781,815)	(14,420,376)
Net Realized Gain (Loss) on
United States Treasury Obligations		632		1,263	6,622
Commodity Futures Contracts		(66,087,932)	(301,640,755)	(265,281,304)	(727,075,762)
Net Realized Gain (Loss)		(66,087,300)	(301,640,755)	(265,280,041)	(727,069,140)
Net Change in Unrealized Gain (Loss) on
United States Treasury Obligations		195,958	14,279	374,068	(20,130)
Commodity Futures Contracts		381,444,063	468,319,830	570,979,786	647,818,126
Net Change in Unrealized Gain (Loss)		381,640,021	468,334,109	571,353,854	647,797,996
Net Realized and Net Change in Unrealized Gain (Loss) on United States Treasury Obligations and Commodity Futures Contracts		315,552,721	166,693,354	306,073,813	(79,271,144)
Net Income (Loss)		$ 312,068,812	$ 159,911,590	$ 299,291,998	$ (93,691,520)

[1] Interest Expense for the periods ended June 30, 2016 represents interest expense on overdraft balances. These amounts are included in Interest Income for the periods ended June 30, 2015.