Question

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A pension fund manager is considering three mutual funds. The first is a stock fund, the...

A pension fund manager is considering three mutual funds. The first is a stock fund, the second is a long-term government and corporate bond fund, and the third is a T-bill money market fund that yields a sure rate of 4.1%. The probability distributions of the risky funds are:   

Expected Return Standard Deviation
Stock fund (S) 11 % 33 %
Bond fund (B) 8 % 25 %

The correlation between the fund returns is .1560.


Suppose now that your portfolio must yield an expected return of 9% and be efficient, that is, on the best feasible CAL.


a. What is the standard deviation of your portfolio? (Do not round intermediate calculations. Round your answer to 2 decimal places.)


Standard deviation             %

b-1. What is the proportion invested in the T-bill fund? (Do not round intermediate calculations. Round your answer to 2 decimal places.)


Proportion invested in the T-bill fund             %


b-2. What is the proportion invested in each of the two risky funds? (Do not round intermediate calculations. Round your answers to 2 decimal places.)

Proportion Invested
Stocks %
Bonds %

Solutions

Expert Solution

Stock Fund=Asset 1,Bond Fund=Asset 2
Expected Return of asset1=R1= 11%
ExpectednReturn of asset2=R2= 8%
Standard deviation of asset 1=S1= 33%
Standard deviation of asset 2=S2= 25%
Correlation of asset 1 and 2=Corr(1,2) 0.1560
Covariance(1,2)=Corr(1,2)*S1*S2= 128.7
w1=Investment in asset 1
w2=Investment in asset 2
Portfolio Return
w1*R1+w2*R2=w1*11+w2*8 ……..Equation (1)
Portfolio Variance=(w1^2)*(S1^2)+(w2^2)*(S2^2)+2*w1*w2*Cov(1,2)
Portfolio Variance=(w1^2)*(33^2)+(w2^2)*(25^2)+2*w1*w2*128.7
Portfolio Variance=(w1^2)*1089+(w2^2)*625+w1*w2*257.4……………Equation (2)
Portfolio Standard Deviation=Square root of Variance
Standard Deviation for best Feasible CAL 22.7967432
Weight of Stock 0.55
Weight of Bond 0.45
ALL POSSIBLE PORTFOLIOS Equation(1)
w1 w2 Rp=w1*11+w2*8 Vp(Using Equation (2) Sp=Square root of Vp SR=(Rp-4.1)/Sp
Weight of Weight of Portfolio Portfolio Portfolio SHARP
STOCK BOND Return(%) Variance Std. Deviation(%) RATIO
0 1 8 625 25 0.156
0.1 0.9 8.3 540.306 23.2445 0.18068804
0.2 0.8 8.6 484.744 22.0169 0.20438842
0.3 0.7 8.9 458.314 21.4083 0.22421242
0.4 0.6 9.2 461.016 21.4713 0.23752656
0.5 0.5 9.5 492.85 22.2002 0.24324078
0.55 0.45 9.65 519.692 22.7967 0.24345583
0.6 0.4 9.8 553.816 23.5333 0.24221002
0.7 0.3 10.1 643.914 25.3755 0.23644891
0.8 0.2 10.4 763.144 27.6251 0.22805379
0.85 0.15 10.55 833.684 28.8736 0.22338763
0.9 0.1 10.7 911.506 30.1912 0.21860705
1 0 11 1089 33 0.20909091
Portfolio Expected   Return 9.65 %
Portfolio Standard Deviation 22.7967432 %
SharpRatio for best feasible CAL 0.24345583
w1=0.55, w2=0.45

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