Use the Information for the Question(s)below

Essay

Use the information for the question(s)below.
Tom's portfolio consists solely of an investment in Merck stock.Merck has an expected return of 13% and a volatility of 25%.The market portfolio has an expected return of 12% and a volatility of 18%.The risk-free rate is 4%.Assume that the CAPM assumptions hold in the market.
-You currently own $100,000 worth of Wal-Mart stock.Suppose that Wal-Mart has an expected return of 14% and a volatility of 23%.The market portfolio has an expected return of 12% and a volatility of 16%.The risk-free rate is 5%.Assuming the CAPM assumptions hold,what alternative investment has the lowest possible volatility while having the same expected return as Wal-Mart? What is the volatility of this portfolio?