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Note 8 - Financial Highlights (Tables)
3 Months Ended
Mar. 31, 2026
Notes Tables  
Financial Highlights [Table Text Block]
   

Three Months Ended
March 31,

 
   

2026

   

2025

 

Net asset value per Share, beginning of period

  $ 42.94     $ 26.04  
                 

Net investment loss(a)

    (0.01 )     (0.00 )(b)

Net realized and unrealized gain(c)

    3.00       5.03  

Net increase in net assets from operations

    2.99       5.03  

Net asset value per Share, end of period

  $ 45.93     $ 31.07  
                 

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

    6.96 %     19.32 %
                 

Ratio to average net assets:

               

Net investment loss(f)

    (0.07 )%     (0.07 )%

Total expenses(f)

    0.09 %     0.09 %

Total expenses after fees waived(f)

    0.07 %     0.07 %