Question: The risk-free rate is 1% while the expected return and standard deviation of the market portfolio (S&P 500) are 9% and 19%, respectively. (a) What
The risk-free rate is 1% while the expected return and standard deviation of the market portfolio (S&P
500) are 9% and 19%, respectively.
(a) What is the standard deviation of a combination of risk-free security and S&P 500 that has an
expected return of 12%? What is its probability of loss? Assume that the S&P 500 returns have
a normal probability distribution.
(b) The optimal allocation to S&P 500 for an investor is 60%. What will be the optimal allocation to
S&P 500 for this investor if the standard deviation of S&P 500 returns were to increase to 25%?
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