If the expected return and standard deviation of returns for Stock A are 10 percent and 20 percent, respectively, and the expected return and standard deviation of returns for Stock B are 15 percent and 35 percent, respectively, which should you choose? Assume that the risk-free rate is 8 percent.

Consider a treasury bill with a rate of return of 5% and the following risky securities: security a: e(r) = .15; variance = .0400 security b: e(r) = .10; variance = .0225 security c: e(r) = .12; variance = .1000 security d: e(r) = .13; variance = .0625 the investor must develop a complete portfolio by combining the risk-free asset with one of the securities mentioned above. the security the investor should choose as part of her complete portfolio to achieve the best cal would be a. security a b. security b c. security c d. security d