Consider the following capital market: a risk-free asset yielding 4.00% per year and a mutual fund consisting of 75% stocks and 25% bonds. The expected return on stocks is 9.00% per year and the expected return on bonds is 6.50% per year. The standard deviation of stock returns is 27.00% and the standard deviation of bond returns 15.00%. The stock, bond and risk-free returns are all uncorrelated.

1. What is the expected return on the mutual fund?

2. What is the standard deviation of returns for the mutual fund?

Now, assume the correlation between stock and bond returns is 0.70 and the correlations between stock and risk-free returns and between the bond and risk-free returns are 0 (by construction, correlations with the risk-free asset are always zero).

3. What is the standard deviation of returns for the mutual fund? Is it higher or lower than the standard deviation found in part 2? Why?

Now, assume that the standard deviation of the mutual fund portfolio is exactly 20.00% per year and a potential customer has a risk-aversion coefficient of 2.5.

4. What correlation between the stock and bond returns is consistent with this portfolio standard deviation?

5. What is the optimal allocation to the risky mutual fund (the fund with exactly 20% standard deviation) for this investor?

6. What is the expected return on the complete portfolio?

7. What is the standard deviation of the complete portfolio?

8. What is the Sharpe ratio of the complete portfolio?



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