Question

The universe of available securities includes two risky stocks A and B, and a risk-free asset....

The universe of available securities includes two risky stocks A and B, and a risk-free asset. The data for the universe are as follows:

Assets Expected Return Standard Deviation
Stock A 6% 25%
Stock B 12% 42%
Risk free 5% 0


The correlation coefficient between A and B is -0.2.

The investor maximizes a utility function

U=E(r)−σ2

(i.e. she has a coefficient of risk aversion equal to 2).

Assume that to maximize his utility when there is no available risk-free asset, an investor invest w in stock A and 1-w in stock B.

a) What is the value of w?

Further assume that this investor has A=5 and the above risky portfolio in a) containing A and B is the OPTIMAL risky portfolio. The investor wants to maximize his utility when using both risky assets and risk-free asset. How much will he invest in stocks A and B and in risk free assets?

Weight in stock A?

Weight in stock B?

Weight in risk-free asset?

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Answer #1

ΑΔωων - The Universe Includes two risky and a risk free for the universe of availbles securities stocks A. and B. Asset the d

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