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Note 8 - Financial Highlights
6 Months Ended
Jun. 30, 2017
Notes to Financial Statements  
Financial Highlights [Text Block]
8
- Financial Highlights
 
The following financial highlights relate to investment performance and operations for a Share outstanding for the
three
and
six
months ended
June 
30,
 
2017
and
2016.
 
 
 
Three Months Ended
June 30,
 
 
Six Months Ended
June 30,
 
 
 
2017
 
 
2016
 
 
2017
 
 
2016
 
Net asset value per Share, beginning of period
  $
11.98
    $
11.93
    $
11.16
    $
10.25
 
                                 
Net investment loss
(a)
   
(0.01
)    
(0.01
)    
(0.01
)    
(0.01
)
Net realized and unrealized gain (loss)
(b)
   
(0.02
)    
0.81
     
0.80
     
2.49
 
Net increase (decrease) in net assets from operations
   
(0.03
)    
0.80
     
0.79
     
2.48
 
Net asset value per Share, end of period
  $
11.95
    $
12.73
    $
11.95
    $
12.73
 
                                 
Total return, at net asset value
(c)(d)
   
(0.25
)
%
   
6.71
%
   
7.08
%
   
24.20
%
                                 
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
%
 
 

(a)
Based on average Shares outstanding during the period.
(b)
The amounts reported for a Share outstanding
may
not
accord with the change in aggregate gains and losses on investment for the period due to the timing of Trust Share transactions in relation to the fluctuating fair values of the Trust’s underlying investment.
(c)
Based on the change in net asset value of a Share during the period.
(d)
Percentage is
not
annualized.
(e)
Percentage is annualized.