Take the tour ×  I have set of log-return values. For this set
need to calculate Coefficient of Variation with outlier values
penalization.  I'm just squaring all values to penalize outliers
and there are different variants how we can calculate CoV:  CoV
= $\frac{StDev(X^2)}{Average(X^2)}$  CoV =
$\frac{\sqrt{StDev(X^2)}}{Average(X)}$  CoV =
$\frac{\sqrt{StDev(X^2)}}{\sqrt{Average(X^2)}}$  Which method is
more useful and correct?  share|improve this question add
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