Statements of Income and Expenses (Unaudited) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Income
Interest Income	$ 11,447,257	$ 2,898,602	$ 19,033,572	$ 5,478,768
Dividends from Affiliates	658,916	142,474	1,085,554	284,273
Total Income	12,106,173	3,041,076	20,119,126	5,763,041
Expenses
Management Fees	6,497,528	4,191,521	11,799,463	9,353,258
Brokerage Commissions and Fees	59,508	74,661	245,498	166,944
Interest Expense	11,459	34,884	18,237	62,945
Total Expenses	6,568,495	4,301,066	12,063,198	9,583,147
Less: Waivers	(107,259)	(135,535)	(219,832)	(229,185)
Net Expenses	6,461,236	4,165,531	11,843,366	9,353,962
Net Investment Income (Loss)	5,644,937	(1,124,455)	8,275,760	(3,590,921)
Net Realized Gain (Loss) on
United States Treasury Obligations	(9,993)	(12,675)	(5,564)	(42,339)
Commodity Futures Contracts	91,323,528	(63,372,537)	149,343,521	(1,182,345)
Net Realized Gain (Loss)	91,313,535	(63,385,212)	149,337,957	(1,224,684)
Net Change in Unrealized Gain (Loss) on
United States Treasury Obligations	603,611	266,321	259,962	150,092
Affiliated Investments	1,020,132	450,756	1,992,816	535,214
Commodity Futures Contracts	17,443,048	(42,197,634)	(3,075,603)	(201,066,322)
Net Change in Unrealized Gain (Loss)	19,066,791	(41,480,557)	(822,825)	(200,381,016)
Net Realized and Net Change in Unrealized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Commodity Futures Contracts	110,380,326	(104,865,769)	148,515,132	(201,605,700)
Net Income (Loss)	$ 116,025,263	$ (105,990,224)	$ 156,790,892	$ (205,196,621)