Standard deviation is a basic statistic that represents the degree of dispersion in data. It tells us 'how spread out the data is,' which is something you cannot determine from the average ...

Standard deviation and standard error may look like the same type of 'variability,' but they refer to different things. If ...

Flickr via Google Images Standard deviation is a concept that's thrown around frequently in finance. So what is it? When working with a quantitative data set, one of the first things we want to know ...

Standard deviation is a metric that shows the variability of a security’s returns over time. It can be used to gauge volatility based on past performance and compare a future return to past returns.

Steven Nickolas is a writer and has 10+ years of experience working as a consultant to retail and institutional investors. Gordon Scott has been an active investor and technical analyst for 20+ years.