Select 3 companies listed on the S&P 500 in one of the financial institutions (Commercial banks, Investment banks, Insurance companies), download the stock price data for 5 years (monthly). Considering the risk-free rate is 6% and the market index is 14%

a) Calculate the expected rate of return, standard deviation, and the slope for each of the company.

b.) Identify and justify which stock would be more appropriate for an investor who wants t: i. add this stock to a well-diversified equity portfolio. Or ii. hold this stock as a single-stock portfolio.