Note 8 - Financial Highlights (Tables)

9 Months Ended

Sep. 30, 2023

Notes Tables

Financial Highlights [Table Text Block]

	Three Months Ended September 30,						Nine Months Ended September 30,
	2023			2022			2023			2022
Net asset value per Share, beginning of period	$	36.23		$	34.51		$	34.38		$	34.62
Net investment loss(a)		(0.02	)		(0.02	)		(0.07	)		(0.06	)
Net realized and unrealized gain (loss)(b)		(0.79	)		(2.75	)		1.11			(2.82	)
Net increase (decrease) in net assets from operations		(0.81	)		(2.77	)		1.04			(2.88	)
Net asset value per Share, end of period	$	35.42		$	31.74		$	35.42		$	31.74
Total return, at net asset value(c)(d)		(2.24	)%		(8.03	)%		3.03	%		(8.32	)%
Ratio to average net assets:
Net investment loss(e)		(0.25	)%		(0.25	)%		(0.25	)%		(0.25	)%
Expenses(e)		0.25	%		0.25	%		0.25	%		0.25	%