Note 8 - Financial Highlights (Tables)

9 Months Ended

Sep. 30, 2022

Notes Tables

Financial Highlights [Table Text Block]

	Three Months Ended September 30,						Nine Months Ended September 30,
	2022			2021			2022			2021(a)
Net asset value per Share, beginning of period	$	34.51		$	33.58		$	34.62		$	36.06
Net investment loss(b)		(0.02	)		(0.02	)		(0.06	)		(0.06	)
Net realized and unrealized loss(c)		(2.75	)		(0.39	)		(2.82	)		(2.83	)
Net decrease in net assets from operations		(2.77	)		(0.41	)		(2.88	)		(2.89	)
Net asset value per Share, end of period	$	31.74		$	33.17		$	31.74		$	33.17
Total return, at net asset value(d)(e)		(8.03	)%		(1.22	)%		(8.32	)%		(8.01	)%
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	%