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Note 8 - Financial Highlights (Tables)
6 Months Ended
Jun. 30, 2025
Notes Tables  
Financial Highlights [Table Text Block]
  

Three Months Ended
June 30,

  

Six Months Ended
June 30,

 
  

2025

  

2024

  

2025

  

2024

 

Net asset value per Share, beginning of period

 $58.77  $41.88  $49.29  $39.03 

Net investment loss(a)

  (0.04)  (0.03)  (0.07)  (0.05)

Net realized and unrealized gain(b)

  3.25   2.21   12.76   5.08 

Net increase in net assets from operations

  3.21   2.18   12.69   5.03 

Net asset value per Share, end of period

 $61.98  $44.06  $61.98  $44.06 
                 

Total return, at net asset value(c)(d)

  5.46%  5.21%  25.75%  12.89%
                 

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%