Note 8 - Financial Highlights (Tables)

9 Months Ended

Sep. 30, 2021

Notes Tables

Financial Highlights [Table Text Block]

	Three Months Ended September 30,						Nine Months Ended September 30,
	2021(a)			2020(a)			2021(a)			2020(a)
Net asset value per Share, beginning of period	$	33.58		$	33.76		$	36.06		$	29.12
Net investment loss(b)		(0.02	)		(0.02	)		(0.06	)		(0.06	)
Net realized and unrealized gain (loss)(c)		(0.39	)		2.26			(2.83	)		6.94
Net increase (decrease) in net assets from operations		(0.41	)		2.24			(2.89	)		6.88
Net asset value per Share, end of period	$	33.17		$	36.00		$	33.17		$	36.00
Total return, at net asset value(d)(e)		(1.22	)%		6.64	%		(8.01	)%		23.63	%
Ratio to average net assets:
Net investment loss(f)		(0.25	)%		(0.25	)%		(0.25	)%		(0.25	)%
Expenses(f)		0.25	%		0.25	%		0.25	%		0.25	%