Consider two assets, A and B in three equally likely scenarios. In scenario 1, they earn 4% and 10%, respectively. In scenario 2, they both earn 5%. In scenario 3, they earn 6% and 0%, respectively. Find the expected rates of return for assets A and B. S1 S2 S3 Asset A 4% 5% 6% Asset B 10% 5% 0% Which asset would a risk-averse investor, who cares only about expected return and risk and can choose only one or the other, prefer?
Assets A | ||||
Exp. Return | Variance | |||
Scenario | Prob. | AR | AR * Prob. | (AR-ER)^2*Prob. |
1 | 0.3333333 | 4 | 1.3333 | 0.3333 |
2 | 0.3333333 | 5 | 1.6667 | 0.0000 |
3 | 0.3333333 | 6 | 2.0000 | 0.3333 |
5.0000 | 0.6667 | |||
ER = sum= | 5.00% | |||
Std. Dev.= SQRT(Variance) | 0.82 | |||
Assets B | ||||
Exp. Return | Variance | |||
Scenario | Prob. | AR | AR * Prob. | (AR-ER)^2*Prob. |
1 | 0.3333333 | 10 | 3.333333333 | 8.33333333 |
2 | 0.3333333 | 5 | 1.666666667 | 0 |
3 | 0.3333333 | 0 | 0 | 8.33333333 |
5.00 | 16.67 | |||
ER = sum= | 5.00% | |||
Std. Dev.= SQRT(Variance) | 4.08 | |||
Expected return of Both Asset A and B is 5%. But risk (Standard deviation) is less in case of Asset A (0.82%), | ||||
So Risk averse investor will always prefer Asset A. |
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