Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Thomas J. Brock is a CFA and CPA with more ...

In statistics, the standard deviation is a measure of the amount of variation or dispersion of a set of values. A low standard deviation indicates that the values tend to be close to the mean (also ...

You're currently following this author! Want to unfollow? Unsubscribe via the link in your email. Standard deviation is a concept that's thrown around frequently in finance. So what is it? When ...