Statements of Cash Flows (Unaudited) - USD ($)		3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Cash flows from operating activities:
Net Income (Loss)		$ (17,223,903)	$ 20,173,444	$ (26,928,661)	$ 4,208,534
Adjustments to reconcile net income (loss) to net cash provided by (used for) operating activities:
Cost of securities purchased				(439,979,974)	(595,948,926)
Proceeds from securities sold and matured				436,999,683	528,998,026
Net accretion of discount on United States Treasury Obligations				(20,392)	(54,965)
Net realized (gain) loss on United States Treasury Obligations		(959)	(1,498)	(1,144)	(1,708)
Net change in unrealized (gain) loss on United States Treasury Obligations and Commodity Futures Contracts		14,669,515	(22,763,005)	9,694,179	(19,951,855)
Change in operating receivables and payables:
Payable for LME contracts				9,209,280	(10,269,919)
Management fee payable				1,162	28,975
Brokerage fee payable				361	(906)
Net cash provided by (used for) operating activities				(11,025,506)	(92,992,744)
Cash flows from financing activities:
Proceeds from sale of Shares				130,193,589	153,774,409
Redemption of Shares				(136,638,949)	(77,298,278)
Net cash provided by (used for) financing activities				(6,445,360)	76,476,131
Net change in cash				(17,470,866)	(16,516,613)
Cash held at beginning of period	[1]			27,364,752	24,778,734
Cash held at end of period	[1],[2]	$ 9,893,886	$ 8,262,121	$ 9,893,886	$ 8,262,121

[1] Cash at December 31, 2014 and prior reflects cash held by the Predecessor Commodity Broker.

[2] Cash at June 30, 2015 reflects cash held by the Custodian.