Stock returns: average, variance, and standard deviation
Shows how to download stock data from Yahoo Finance, and calculate daily stock returns, average stock returns, variance and standard deviation of stock returns
Some good books on Excel and Finance:
Financial Modeling - by Benninga:
http://amzn.to/2tByGQ2
Principles of Finance with Excel - by Benninga:
http://amzn.to/2uaCyo6