question archive The fund manager has 20 million euros to invest

The fund manager has 20 million euros to invest

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The fund manager has 20 million euros to invest. He wants to buy some equities, which have an expected annual return of 14,5% and expected risk of 22,5%. To reduce the risk of the portfolio, he decided to add some fixed income securities. Bonds will have expected annual return of 3,5% and risk of 2,3% The correlation coefficient between two portfolios is -0,83. a. How much should be invested into equities and bonds in order to reduce overall risk level to minimum? b. What would be the expected combined return from both portfolios?

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a.

Expected return of the equity Ea = 14.5%
Standard deviation of the equity Sa = 22.5%
Variance of the equity Va = 22.52 = 506.25%

Expected return of the fixed income Eb = 3.5%
Standard deviation of the fixed income Sb = 2.3%
Variance of the fixed income Vb = 2.32 = 5.29%

Let Wa be the weight in equities and Wb be the weight in fixed income
Wa + Wb = 1, Wb = 1 - Wa

Minimum variance portfolio Vp = Wa2 x Va2 + Wb2 x Vb2 + 2 x Wa x Wb x Sa x Sb x Corr.(a,b)

Vp = Wa2 x 506.25 + (1 - Wa2) x 5.29 + 2 x Wa x (1 - Wa) x 22.5 x 2.3 x (-0.83)

Vp = Wa2 x 506.25 + 5.29 - Wa2 x 5.29 - 85.905 x Wa + 85.905 x Wa2

Vp = Wa2 x 586.865 - 85.905 x Wa + 5.29

Taking the first derivative of the above equation,

0 = Wa x 1,173.73 - 85.905

Wa = 0.07319 or 7.319%

Wb = 100 - 7.319 = 92.681%

7.319% should be invested in equities and 92.681% should be invested in fixed income to reduce overall risk to minimum

b.

Expected return = Wa x Ea + Wb x Eb = 0.07319 x 14.5 + 0.92681 x 3.5 = 4.305%