Note 8 - Financial Highlights (Tables)

6 Months Ended

Jun. 30, 2021

Notes Tables

Financial Highlights [Table Text Block]

	Three Months Ended June 30,						Six Months Ended June 30,
	2021(a)			2020(a)			2021(a)			2020(a)
Net asset value per Share, beginning of period	$	32.22		$	30.74		$	36.06		$	29.12
Net investment loss(b)		(0.02	)		(0.02	)		(0.04	)		(0.04	)
Net realized and unrealized gain (loss)(c)		1.38			3.04			(2.44	)		4.68
Net increase (decrease) in net assets from operations		1.36			3.02			(2.48	)		4.64
Net asset value per Share, end of period	$	33.58		$	33.76		$	33.58		$	33.76
Total return, at net asset value(d)(e)		4.22	%		9.82	%		(6.88	)%		15.93	%
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	%