Stocks A and B have the following probability distributions of expected future returns:
Probability | A | B | ||
0.1 | (7 | %) | (28 | %) |
0.2 | 5 | 0 | ||
0.4 | 15 | 18 | ||
0.2 | 22 | 28 | ||
0.1 | 29 | 46 |
Answer:
a. the expected rate of return
Probability | A ( % Return ) | Expected Return of Stock A | B ( % Return ) | Expected Return of Stock B |
0.1 | (7) | = 0.1 X (7%) = (0.7 %) | (28) | = 0.1 X (28%) = (2.8%) |
0.2 | 5 | = 0.2 X 5% = 1% | 0 | = 0.2 X 0 = 0% |
0.4 | 15 | = 0.4 X 15% = 6% | 18 | = 0.4 X 18% = 7.2% |
0.2 | 22 | = 0.2 X 22% = 4.4% | 28 | = 0.2 X 28% = 5.6% |
0.1 | 29 | = 0.1 X 29% = 2.9% | 46 | = 0.1 X 46% = 4.6% |
13.60% | 14.60 % |
b. the standard deviation of expected returns :
Probability | A( % ) Return | Variance A - | ( A - )2 | P X ( A - )2 | B ( % ) Return | Variance B - | ( B - )2 | P X ( B - )2 |
0.1 | (7) | = (7) - 13.6= - 20.6 | 424.36 | 42.44 | (28) | =(28 ) -14.6= -42.60 | 1814.76 | 181.48 |
0.2 | 5 | = 5 -13.6 = 8.6 | 73.96 | 14.79 | 0 | =0-14.6= -14.6 | 213.16 | 42.63 |
0.4 | 15 | =15-13.6= 1.4 | 1.96 | 0.78 | 18 | = 18-14.6= 3.4 | 11.56 | 4.624 |
0.2 | 22 | =22-13.6= 8.4 | 70.56 | 14.11 | 28 | = 28-14.6 = 13.4 | 179.56 | 35.91 |
0.1 | 29 | =29-13.6= 15.4 | 237.16 | 23.72 | 46 | = 46-14.6 = 31.4 | 985.96 | 98.60 |
808 | 363.24 |
= = 28.43
= = 19.06
C. the coefficient of variation for Stock B. Do not round intermediate calculations. Round your answer to two decimal places.
Coefficient of Variation of Stock B = Standard Deviation of B / Mean of B = 19.06 / 13.60 = 1.40
Here we taken mean value as expected return
d. Assume the risk-free rate is 4.5%. What are the Sharpe ratios for Stocks A and B? Do not round intermediate calculations. Round your answers to four decimal places.
Sharpe Ratio = ( Return of Stock - Risk Free Return ) /
Sharpe Ratio A = ( 13.60 - 4.5 ) % / 28.43 = 0.32
Sharpe Ratio B = ( 14.60 - 4.5 ) % / 19.06 = 0.53
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