standard deviation


A statistical measure of the historical volatility of a mutual fund or portfolio, usually computed using 36 monthly returns. More generally, a measure of the extent to which numbers are spread around their average.

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The standard deviation was large enough that the variability we could come to expect in the upcoming months could be high.

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You should follow the standard deviation of your numbers to figure our if there is any way to quickly improve.

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The standard deviation of his stock portfolio seemed to indicate that the value only fluctuated around ten percent up or down depending on the strength of the market at any given time.

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