Historical volatility is a long-term assessment of risk. Discover why it is important to investors and learn how to calculate volatility in Excel.

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 ...

Calculating Historical Volatility in Excel To calculate the volatility of a given security in a Microsoft Excel spreadsheet, first determine the time frame for which the metric will be computed.