Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Somer G. Anderson is CPA, doctor of ...

When reviewing cash flow data for your small business, knowing the standard deviation can help you determine if the numbers are out of whack. Calculating standard deviation manually can be ...

Brian Beers is a digital editor, writer, Emmy-nominated producer, and content expert with 15+ years of experience writing about corporate finance & accounting, fundamental analysis, and investing.

Use Excel to calculate daily returns and standard deviation to gauge stock volatility. Annualize volatility by multiplying daily standard deviation by the square root of 252. Remember, standard ...

While Excel is useful for many applications, it is an indispensable tool for those managing statistics. Two common terms used in statistics are Standard Deviation and ...

Standard deviation is a common statistical measurement and is defined by Oxford Dictionaries as: ‘A quantity expressing by how much the members of a group differ from the mean value for the group.’ In ...

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 is what the "typical" ...

Annualized volatility is calculated as standard deviation times square root of periods. High annualized volatility indicates greater price variability and potential risk. Investors use annualized ...

In response to my article, Is the Stock Market Too Concentrated?, which relied upon standard-deviation calculations to assess investment risk, a reader wrote: “My problem [with your argument] is ...