Suppose that there are two assets: A and B. Asset A has expected return of 20%. B has expected return of 12% and standard deviation of σ* σ* = standard Deviation (σ) (a) “As B is strictly dominated by A in terms of total risk (standard deviation), there is no value in having B in portfolio formation.” (Without doing any calculation) (b) “If the correlation coefficient ρ between A and B = 1, it is always optimal to invest in A only.” (Show your proof) (c) “If the correlation coefficient ρ between A and B = -1, it is always optimal to invest in 50% in A and 50% in B when forming a minimum variance portfolio of the two.” (Show your proof) [ (d) “Given that σA= σB=σ*, it is always optimal to combine half of A and half of B when forming a minimum variance portfolio of the two when ρ ε (-1,1).” (Show your proof)
Risk and return
Before understanding the concept of Risk and Return in Financial Management, understanding the two-concept Risk and return individually is necessary.
Capital Asset Pricing Model
Capital asset pricing model, also known as CAPM, shows the relationship between the expected return of the investment and the market at risk. This concept is basically used particularly in the case of stocks or shares. It is also used across finance for pricing assets that have higher risk identity and for evaluating the expected returns for the assets given the risk of those assets and also the cost of capital.
Suppose that there are two assets: A and B. Asset A has expected return of 20%. B has expected return of 12% and standard deviation of σ*
σ* = standard Deviation (σ)
(a) “As B is strictly dominated by A in terms of total risk (standard deviation), there is no value in having B in portfolio formation.” (Without doing any calculation)
(b) “If the correlation coefficient ρ between A and B = 1, it is always optimal to invest in A only.” (Show your proof)
(c) “If the correlation coefficient ρ between A and B = -1, it is always optimal to invest in 50% in A and 50% in B when forming a minimum variance portfolio of the two.” (Show your proof) [
(d) “Given that σA= σB=σ*, it is always optimal to combine half of A and half of B when forming a minimum variance portfolio of the two when ρ ε (-1,1).” (Show your proof)
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