
Zitat von
Monseniore Grüny
meine lösungen:
Aufgabe 1:
CAPM-conditions hold. The variance of the market is 0,0064; the riskfree rate is 2% and
the expected return on the market is 8%. We study the two assets A and B.
μA=6% μB=8% sA=40% sB=30% rAB=0,25
a) Calculate Beta of asset A?
betaA = CovarianceAB / VarianceA^2
CovarianceAB = pAB*riskA*riskB = 0,25*0,4*0,3 = 0,03
betaA = 0,03 / 0,4^2 = 0,1875
b) Is asset A efficient?
???
c) What is the expected return of a portfolio invested in A (20%), B (50%) and the risk
free rate (30%)?
xA = 0,2; xB = 0,5; xrF = 0,3
0,2*0,06 + 0,5*0,08 + 0,3*0,02 = 0,058 à 5,8%
Bin mir hier nicht sicher…
d) What is the slope of the Capital Market Line?
Market risk = Wurzel Varianz = 0,08
returnM – rF / riskM = 0,08 – 0,02 / 0,08 = 0,75
e) Calculate the expected risk of a Portfolio of A and B (50% each)
RiskPF^2 = 0,5^2 * 0,4^2 + 0,5^2 * 0,3^2 + 2*0,5*0,5*covarianzAB
CovarianceAB = pAB*riskA*riskB = 0,03
riskPF = 0,0775 à 7,8%
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