The standard deviation of stock returns for Stock A is 25%. The standard deviation of the market return is 15% and the correlation between Stock A and the market is 0.75.
a. Calculate Stock A's beta.
b. In a bull market with rapidly increasing stock prices, will Stock A likely outperform or underperform the average stock? Why?
c. Is the beta of a diversified portfolio less stable or more stable than the beta of a single security? Why?