这样算对吗?

股悠

 

Consider investing $1000 in fund QID, the double inverse of an index QQQ that starts at 1000. Assume the index goes up and down by 100 points over and over.

 

Day   QQQ    %change  -2x%change   QID 
0      1000                -         -                1000.00 
1      900       -10.0%    +20.0%           1200.00 
2      1000     +11.1%    -22.2%            933.60 
3      900       -10.0%    +20.0%           1120.32 
4     1000      +11.1%    -22.2%            871.61

summer123