Statements of Financial Condition - USD ($)		Dec. 31, 2016	Dec. 31, 2015
Assets
United States Treasury Obligations, at value (cost $846,190,082 and $1,077,885,299, respectively)		$ 846,158,812	$ 1,077,913,905
Affiliated investments, at value and cost		3,786,312
Total Investments, at value (cost $849,976,394 and $1,077,885,299, respectively)		849,945,124	1,077,913,905
Cash held by custodian	[1],[2]		51,943,740
Receivable for:
Variation margin			4,489,462
Dividends from affiliates		16,819
Total assets		849,961,943	1,134,347,107
Payable for:
Variation margin		3,514,750
Due to custodian		1,000
Management fee		532,758	728,477
Brokerage commissions and fees		4,196	3,814
Total liabilities		4,052,704	732,291
Commitments and Contingencies (Note 9)
Equity
Shareholder's equity—General Shares		1,057	1,026
Shareholders' equity—Shares		845,908,182	1,133,613,790
Total shareholders' equity		845,909,239	1,133,614,816
Total liabilities and equity		$ 849,961,943	$ 1,134,347,107
General Shares outstanding		40	40
Shares outstanding		32,000,000	44,200,000
Net asset value per share		$ 26.43	$ 25.65
Market value per share		$ 26.45	$ 25.64

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

[2] Cash at December 31, 2016 and 2015 reflects cash held by the Custodian.