P=Probability
R=Return, R(AB) = [0.6×R(A)]+[0.4×R(B)]
PR=P×R
ER=Expected Return=Mean=Sum of PR
D=Deviation=R-ER
D^2=Deviation^2=D×D
PD^2=P×D^2
Var=Variance=Sum of PD^2
SD=Standard Deviation=Var^1/2
No. Diversification is not working.
Because A has higher return and lower risk whereas B has comparatively lower return with higher risk. Therefore, diversification leads to lower return and higher risk as compared to A alone.
Unsystematic Risk i.e. risk associated only with that particular security is addressed with portfolio allocation whereas Systematic Risk i.e. risk associated with overall market remains unaffected.
Correlation is the mutual relationship between two things i.e. how and upto what extent same factor affects two securities.
In given case, correlation must be nearer to -1 of at least it will be negative and not zero or positive. Because portfolio allocation leads to lower return and higher risk.
If they were positively correlated, dicersification would be advantageous.
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