Statements of Financial Condition (Unaudited) (USD $)	Jun. 30, 2014		Dec. 31, 2013
Current Assets
Cash and cash equivalents	$ 7,433,146		$ 11,089,091
Short-term investments(a)	1,033,820,142	[1]	1,111,804,587	[1]
Short-term investments held at brokers (restricted)(b)	49,043,183	[2]	53,997,606	[2]
Total Assets	1,090,296,471		1,176,891,284
Current Liabilities
Payable for variation margin on open futures contracts (Note 9)	7,462,183		5,059,530
Sponsor’s fees payable	674,994		738,805
Total Liabilities	8,137,177		5,798,335
Commitments and Contingent Liabilities (Note 7)
Shareholders’ Capital
Shares, no par value, unlimited amount authorized (at redemption value) – 32,000,000 issued and outstanding at June 30, 2014 and 36,400,000 issued and outstanding at December 31, 2013	1,082,159,294		1,171,092,949
Total Shareholders’ Capital	1,082,159,294		1,171,092,949
Total Liabilities and Shareholders’ Capital	$ 1,090,296,471		$ 1,176,891,284
Net Asset Value per Share (in Dollars per share)	$ 33.82		$ 32.17

[1] Cost of short-term investments at June 30, 2014 and December 31, 2013: $1,033,820,142 and $1,111,804,587, respectively.

[2] Cost of short-term investments held at brokers (restricted) at June 30, 2014 and December 31, 2013: $49,043,183 and $53,997,606, respectively.