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.

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There are two formulae for standard deviation. \(s = \sqrt {\frac{{\sum {{{(X - \bar X)}^2}} }}{{n - 1}}}\) (where n is the sample size). The second formula is a re ...

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Four Northeastern Pennsylvania newspapers, including those in Hazleton and Pottsville, have been sold to the Colorado-based MediaNews Group, owned by Alden Global Capital, an investment firm with ...