Note 8 - Financial Highlights

9 Months Ended

Sep. 30, 2015

Financial Highlights [Abstract]

Financial Highlights [Text Block]

8 - Financial Highlights

The following financial highlights relate to investment performance and operations for a Share outstanding for the three months and nine months ended September 30, 2015 and 2014. 

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2015			2014			2015			2014
Net asset value per Share, beginning of period	$	21.18		$	33.82		$	21.36		$	32.17
Net investment loss(a)		(0.04	)		(0.06	)		(0.12	)		(0.19	)
Net realized and unrealized loss(b)		(4.11	)		(4.22	)		(4.21	)		(2.44	)
Net decrease in net assets from operations		(4.15	)		(4.28	)		(4.33	)		(2.63	)
Net asset value per Share, end of period	$	17.03		$	29.54		$	17.03		$	29.54
Total return(c)(d)		(19.59	)%		(12.66	)%		(20.27	)%		(8.18	)%
Ratio to average net assets:
Net investment loss(e)		(0.82	)%		(0.77	)%		(0.81	)%		(0.77	)%
Expenses(e)		0.84	%		0.80	%		0.83	%		0.82	%

(a)     Based on average Shares outstanding during each period.

(b)     The amounts reported for a Share outstanding may not accord with the change in aggregate gains and losses on investments for the period due to the timing of Trust Share transactions in relation to the fluctuating fair values of the Trust’s underlying investments. 

(c)     Based on the change in net asset value of a Share during each period. 

(d)     Percentage is not annualized. 

(e)     Percentage is annualized.