Statements of Financial Condition (Unaudited) - USD ($)	Sep. 30, 2016	Dec. 31, 2015
Assets
United States Treasury Obligations, at value (cost $700,845,450 and $1,077,885,299, respectively)	$ 700,927,362	$ 1,077,913,905
Affiliated investments, at value and cost	39,228,727
Total Investments, at value (cost $740,074,177 and $1,077,885,299, respectively)	740,156,089	1,077,913,905
Cash held by custodian	1,055,360	51,943,740
Receivable for:
Variation margin		4,489,462
Dividends from affiliates	11,158
Total assets	741,222,607	1,134,347,107
Payable for:
Variation margin	675,120
Management fee	474,184	728,477
Brokerage commissions and fees	4,694	3,814
Total liabilities	1,153,998	732,291
Commitments and Contingencies (Note 9)
Equity
Shareholder's equity—General Shares	987	1,026
Shareholders' equity—Shares	740,067,622	1,133,613,790
Total shareholders' equity	740,068,609	1,133,614,816
Total liabilities and equity	$ 741,222,607	$ 1,134,347,107
General Shares outstanding	40	40
Shares outstanding	30,000,000	44,200,000
Net asset value per share	$ 24.67	$ 25.65
Market value per share	$ 24.68	$ 25.64