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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 5.0%. The probability distributions of the risky funds are: Expected Return Standard Deviation Stock fund (S) 11% 40% Bond fund (B) 6% 20% The correlation between the fund returns is .16. What is the expected return and standard deviation of the optimal risky portfolio? (Do not round intermediate calculations. Round your answers to 2 decimal places.) Expected return % Standard deviation %

Solutions

Expert Solution

To find the fraction of wealth to invest in Stock fund that will result in the risky portfolio with maximum Sharpe ratio the following formula to determine the weight of Stock fund in risky portfolio should be used

Where
Stock fund E[R(d)]= 11.00%
Bond fund E[R(e)]= 6.00%
Stock fund Stdev[R(d)]= 40.00%
Bond fund Stdev[R(e)]= 20.00%
Var[R(d)]= 0.16000
Var[R(e)]= 0.04000
T bill Rf= 5.00%
Correl Corr(Re,Rd)= 0.16
Covar Cov(Re,Rd)= 0.0128
Stock fund Therefore W(*d)= 0.7320
Bond fund W(*e)=(1-W(*d))= 0.2680
Expected return of risky portfolio= 9.66%
Risky portfolio std dev= 30.60%
Where
Var = std dev^2
Covariance = Correlation* Std dev (r)*Std dev (d)
Expected return of the risky portfolio = E[R(d)]*W(*d)+E[R(e)]*W(*e)
Risky portfolio standard deviation =( w2A*σ2(RA)+w2B*σ2(RB)+2*(wA)*(wB)*Cor(RA,RB)*σ(RA)*σ(RB))^0.5

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