Statements of Cash Flows (Unaudited) - USD ($)	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash flows from operating activities:
Net Income (Loss)	$ (58,327,172)	$ (30,727,823)
Adjustments to reconcile net income (loss) to net cash provided by (used for) operating activities:
Cost of securities purchased	(1,577,744,241)	(2,337,437,564)
Proceeds from securities sold and matured	1,898,934,214	2,715,949,582
Cost of affiliated investments purchased	(820,224,384)	(203,868,238)
Proceeds from affiliated investments sold	708,965,383	164,639,511
Net accretion of discount on United States Treasury Obligations	(3,360,161)	(1,473,049)
Net realized (gain) loss on United States Treasury Obligations and Affiliated Investments	8,862	880
Net change in unrealized (gain) loss on United States Treasury Obligations, Affiliated Investments and Currency Futures Contracts	(204,842)	(53,306)
Change in operating assets and liabilities:
Variation margin- Currency Futures Contracts	(3,175,621)	5,164,582
Dividends from affiliates	(4,975)	(11,158)
Management fee	(175,199)	(254,293)
Brokerage commissions and fees	792	880
Net cash provided by (used for) operating activities	144,692,656	311,930,004
Cash flows from financing activities:
Proceeds from purchases of Shares	338,785,804	368,777,500
Redemption of Shares	(483,477,960)	(731,595,884)
Decrease in payable for amount due to custodian, net	(500)
Net cash provided by (used for) financing activities	(144,692,656)	(362,818,384)
Net change in cash		(50,888,380)
Cash at beginning of period		51,943,740
Cash at end of period		1,055,360
Supplemental disclosure of cash flow information
Cash paid for interest	$ 7,323	$ 10,970