The Expected return of a stock can be calculated as
where pi are the individual probabilities and Ri are the indiividual returns
Therefore B = 0.1* (-23%) + 0.2* 0% +0.4*23% +0.2*27% +0.1*48%
=-2.3%+0%+9.2%+5.4%+4.8%
=17.1%
The Expected Standard Deviation of a stock can be calculated as
Therefore,
= sqrt { 0.1 * (-11 - 14.6)2 +0.2 * (6 -
14.6)2 +0.4 * (15 - 14.6)2 +0.2 * (23 -
14.6)2 +0.1 * (39 - 14.6)2 }
= sqrt (65.54+14.79+0.064+14.11+59.53)
= 12.41%
Coefficient of Variation is given by
Therefore for B , CVB = 18.66%/17.1% = 1.09
for A , CVA = 12.41%/14.6% = 0.85
If the stock B has a less higher correlation with market than A , then its Beta may be less than that of A because Beta of a stock is given by
Beta = Covariance between stock returns and market returns / market returns' variance
= correlation coefficient * st.dev. of stock * st. dev of Market/ market std. dev2
= correlation coefficient * st.dev of stock / st.dev of market
Even though stock B has higher st.dev. than stock A, a less correlation coefficient may make its Beta lesser than that of A and hence less risky in portfolio sense (option I)
c) Sharpe Ratio = (Rp - Rf) /
Sharpe Ratio for A = (14.6-2.5)/12.41 = 0.975
Sharpe Ratio for B = (17.1-2.5)/18.66 = 0.782
Stock A has less risk than stock B (standard deviation) . Same is also reflected in coefficient of variation
The sharpe ratio also confirm that A is better in terms of overall return per unit risk
As A is less risky than B, and even if stock B has higher st.dev. than stock A, a less correlation coefficient may make its Beta lesser than that of A and hence less risky in portfolio sense
Therefore Option V
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