Consider the following information on Stocks I and II: |
State of Economy | Probability of State of Economy | Rate of Return if State Occurs | |
Stock I | Stock II | ||
Recession | .26 | .025 | −.21 |
Normal | .61 | .325 | .13 |
Irrational exuberance | .13 | .185 | .41 |
The market risk premium is 11.1 percent, and the risk-free rate is 4.1 percent. | |
a. | Calculate the beta and standard deviation of Stock I. (Do not round intermediate calculations. Enter the standard deviation as a percent and round both answers to 2 decimal places, e.g., 32.16.) |
b. | Calculate the beta and standard deviation of Stock II. (Do not round intermediate calculations. Enter the standard deviation as a percent and round both answers to 2 decimal places, e.g., 32.16.) |
c. | Which stock has the most systematic risk? |
d. | Which one has the most unsystematic risk? |
e. | Which stock is “riskier”? |
Probability Stock I Stock II
Recession 0.26 0.025 - 0.21
Boom 0.61 0.325 0.13
Irrational exuberence 0.13 0.185 0.41
Stock I
Expected Return = 0.26 * 0.025 + 0.61 * 0.325 + 0.13 * 0.185
= 0.0065 + 0.19825 + 0.02405
= 0.2288 or 22.88%
Variance = 0.26 (0.025 - 0.2288)2 + 0.61 (0.325 - 0.2288)2 + 0.13 (0.185 - 0.2288)2
= 0.0108 + 0.0056 + 0.00025
= 0.01665
Standard deviation = square root of 0.01665
= 0.1290 or 12.90%
0.2288 = 0.041 + beta * 0.111
0.1878 = beta * 0.111
beta = 1.69
Stock II
Expected return = 0.26 * - 0.21 + 0.61 * 0.13 + 0.13 * 0.41
= - 0.0546 + 0.0793 + 0.0533
= 0.078 or 7.8%
Variance = 0.26 (-0.21 - 0.078)2 + 0.61 (0.13 - 0.078)2 + 0.13 (0.41 - 0.078)2
= 0.0216 + 0.0016 + 0.0143
= 0.0375
Standard deviation = square root of 0.0375
= 0.1936 or 19.36%
0.078 = 0.041 + beta 0.111
beta = 0.33.
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