The Volatility of a Two-Stock Portfolio 5. Using the data in the following table, estimate (a) the average return and volatility for each stock, (b) the covariance between the stocks, and (c) the correlation between these two stocks. ear Stock A Stock B 2010 10% 2196 2011 20% 7% 2012 596 3096 2013 -5% -3% 2014 2% -8% 2015 9% 25%