Net Asset Value and Financial Highlights

3 Months Ended

Mar. 31, 2016

Earnings Per Share [Abstract]

Net Asset Value and Financial Highlights

(10) Net Asset Value and Financial Highlights

The Fund is presenting the following net asset value and financial highlights related to investment performance for a Share outstanding for the Three Months Ended March 31, 2016 and 2015. An individual investor’s return and ratios may vary based on the timing of capital transactions.

Net asset value per Share is the net asset value of the Fund divided by the number of outstanding Shares at the date of each respective period presented.

	Three Months Ended March 31,
	2016			2015
Net Asset Value
Net asset value per Share, beginning of period	$	11.87		$	15.99
Net realized and change in unrealized gain (loss) on United    States Treasury Obligations and Commodity Futures    Contracts	$	0.56			(0.76	)
Net investment income (loss) (a)	$	(0.02	)		(0.03	)
Net income (loss)	$	0.54			(0.79	)
Net asset value per Share, end of period	$	12.41		$	15.20
Market value per Share, beginning of period (b)	$	11.91		$	15.91
Market value per Share, end of period (b)	$	12.41		$	15.17
Ratio to average Net Assets *
Net investment income (loss)		(0.82	)%		(0.80	)%
Total expenses		1.03	%		0.82	%
Total Return, at net asset value **		4.55	%		(4.94	)%
Total Return, at market value **		4.20	%		(4.65	)%

(a) Based on average shares outstanding.

(b) The mean between the last bid and ask prices.

* Percentages are annualized.

** Percentages are not annualized.