In: Finance
E(R)
Stock A Stock B
State p(i) E(Ra) E(Rb)
Recession 30% -30% -20%
Normal 40% 10% 10%
Expansion 30% 50% 30%
Beta 1.4 1.25
Rf 3%
RM 8%
What is the expected return on Stock B across all market situations?
What is the standard deviation of Stock B’s return?
With a mix of 75% Stock A and 25% Stock B what is the portfolio standard deviation?
Which of the two stocks has higher systematic risk?
Are the two stocks under or over-valued based on the Capital asset Pricing Model?
Expected Return on Stock A = PR * E (RR) + PN * E (RN) + PE * E (RE).
Where, PR is Probability of Recession State.
PN is Probability of Normal State.
PE is Probability of Expansion State.
E (RR) is the Expected return of Recession State.
E (RN) is the Expected return of Normal State.
E (RE) is the Expected return of Expansion State.
Expected Return on Stock A = 0.3 * (-0.3) + 0.4 * 0.1 + 0.3 * 0.5
= -0.09 + 0.04 + 0.15
= 0.1 = 10%.
Expected Return on Stock A is 10%.
Expected Return on Stock B = PR * E (RR) + PN * E (RN) + PE * E (RE).
Where, PR is Probability of Recession State.
PN is Probability of Normal State.
PE is Probability of Expansion State.
E (RR) is the Expected return of Recession State.
E (RN) is the Expected return of Normal State.
E (RE) is the Expected return of Expansion State.
Expected Return on Stock B = 0.3 * (-0.2) + 0.4 * 0.1 + 0.3 * 0.3
= -0.06 + 0.04 + 0.09
= 0.07 = 7%.
Expected Return on Stock B is 7%.
Variance of Stock A = PR * [E (RR) – E (RA)]2 + PN * [E (RN) – E (RA)]2 + PE * [E (RE) – E (RA)]2
Where, PR is Probability of Recession State.
PN is Probability of Normal State.
PE is Probability of Expansion State.
E (RR) is the Expected return of Recession State.
E (RN) is the Expected return of Normal State.
E (RE) is the Expected return of Expansion State.
E (RA) is the Expected return of Stock A.
Variance of Stock A = 0.3 * (-0.3 – 0.1)2 + 0.4 * (0.1 – 0.1)2 + 0.3 * (0.5 – 0.1)2
= 0.048 + 0 + 0.048
= 0.096
Variance of Stock A is 9.6%.
Standard Deviation of Stock A = (Variance of Stock A) 1/2
Standard Deviation of Stock A = (0.096)1/2
Standard Deviation of Stock A = 30.98%.
Variance of Stock B = PR * [E (RR) – E (RB)] 2 + PN * [E (RN) – E (RB)] 2 + PE * [E (RE) – E (RB)] 2
Where, PR is Probability of Recession State.
PN is Probability of Normal State.
PE is Probability of Expansion State.
E (RR) is the Expected return of Recession State.
E (RN) is the Expected return of Normal State.
E (RE) is the Expected return of Expansion State.
E (RB) is the Expected return of Stock B.
Variance of Stock B = 0.3 * (-0.2 – 0.07)2 + 0.4 * (0.1 – 0.07)2 + 0.3 * (0.3 – 0.07)2
= 0.02187 + 0.00036 + 0.01587
= 0.0381.
Variance of Stock B is 3.81%.
Standard Deviation of Stock B = (Variance of Stock B) 1/2
Standard Deviation of Stock B = (0.0381)1/2
Standard Deviation of Stock A = 19.51%.
Weight age of Stock A in portfolio = 75%.
Weight age of Stock B in portfolio = 25%.
Expected Return on Stock A is 10%.
Expected Return on Stock B is 7%.
Expected Return of Portfolio = WA * E (RA) + WB * E (RB)
= 0.75 * 0.1 + 0.25 * 0.07
= 9.25%.
Expected Return of Portfolio is 9.25%.
Variance of Portfolio = WA * [E (RA) – E (RP)]2 + WB * [E (RB) – E (RP)]2
Where, WA is Weight of Stock A
WB is Weight of Stock B
E (RA) is the Expected return of Stock A.
E (RB) is the Expected return of Stock B.
E (RP) is the Expected return of Portfolio.
Variance of Portfolio = 0.75 * (0.1 – 0.0925)2 + 0.25 * (0.07 – 0.0925)2
= 0.0548
Variance of Portfolio is 5.48%.
Standard Deviation of Portfolio = (Variance of Portfolio) 1/2
Standard Deviation of Portfolio = (0.0548)1/2
Standard Deviation of Portfolio = 23.41%.
Standard Deviation of Portfolio is 23.41%.
Stock A has more systematic risk as Stock A has more standard Deviation.
Sharpe Ratio of Stock A = (Expected Return of Stock A - Risk Free Rate) / Standard Deviation of A
= (10% - 3%) / 30.98%
= 0.225.
Sharpe Ratio of Stock A is 0.225.
Sharpe Ratio of Stock B = (Expected Return of Stock B - Risk Free Rate) / Standard Deviation of B
= (7% - 3%) / 19.51%
= 0.205.
Sharpe Ratio of Stock B is 0.205.
Stock A has higher reward to risk ratio.
CAPM for Stock A = Risk Free Rate + Beta * Market Return
= 3% + 1.4 * 8%
= 14.2%.
CAPM for Stock B = Risk Free Rate + Beta * Market Return
= 3% + 1.25 * 8%
= 13%.
The expected return on Stock A is 14.2% and for Stock B is 13%.
Both stocks are overpriced.