Note 8 - Financial Highlights (Tables)

6 Months Ended

Jun. 30, 2023

Notes Tables

Financial Highlights [Table Text Block]

	Three Months Ended June 30,						Six Months Ended June 30,
	2023			2022			2023			2022
Net asset value per Share, beginning of period	$	37.53		$	36.92		$	34.38		$	34.62
Net investment loss(a)		(0.02	)		(0.02	)		(0.05	)		(0.04	)
Net realized and unrealized gain (loss)(b)		(1.28	)		(2.39	)		1.90			(0.07	)
Net increase (decrease) in net assets from operations		(1.30	)		(2.41	)		1.85			(0.11	)
Net asset value per Share, end of period	$	36.23		$	34.51		$	36.23		$	34.51
Total return, at net asset value(c)(d)		(3.46	)%		(6.53	)%		5.38	%		(0.32	)%
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	%