Learn how to calculate Standard Deviationin Excel. The STDEV function can be used to estimate standard deviation based on sample in Excel.

Portfolio variance is calculated using the standard deviation of each security in the portfolio and the correlation between securities in the portfolio.

The formula for calculating the standard error of the mean is the sample standard deviation divided by the square root of the sample size.

In a normal distribution, 68% of values are within 1 standard deviation of the mean, 95% of values are within 2 standard deviations of the mean and 99.7% of values are within 3 standard deviations ...