Key financial indicators have been updated as of end August 2008         Site map     Home page     Search the site :
Download formulas
        

Volatility calculation


Download the formula

Around the formula...

The risk carried by a security can be looked at in terms of the dispersion of its possible returns around an average return. Consequently, risk can be measured mathematically by the variance of its return, i.e. by the sum of the squares of the deviation of each return from expected outcome, weighted by the likelihood of each of the possible returns , or:

See also Vernimmen Chapter 21

Back to the list of formulas