The return on the risky portfolio is 15%. The risk-free rate, as well as the investor's borrowing rate, is 10%. The standard deviation of return on the risky portfolio is 20%. If the standard deviation on the complete portfolio is 25%, how much is the expected return on the complete portfolio?
Given,
Return on risky portfolio = 15%
Risk free rate = 10%
Standard deviation on risky portfolio = 20%
Standard deviation on complete portfolio = 25%
Solution :-
Weight of risky asset = Standard deviation on complete portfolio/Standard deviation on risky portfolio
= 25%/20% = 1.25
Weight of risk free asset = 1 - weight of risky asset
= 1 - 1.25 = -0.25
Now,
Expected return on complete portfolio
= (Return on risky portfolio x weight of risky asset) + (risk free rate x weight of risk free asset)
= (15% x 1.25) + (10% x -0.25)
= 18.75% - 2.50%
= 16.25%
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