问题如下图:
选项:
A.
B.
C.
D.
解释:
这题如果先分别计算A与B的VAR,然后再用公式计算组合的VAR也是可以的对吧,中间没有用到A与B在portfolio里的相应的权重哦。最后答案与D非常接近
NO.PZ2019042401000041 问题如下 Analyst BOb collects the following information about assets A anBBaseon the above table, the Vof the portfolio composeof asset A anB 95% confinlevel is : A.$399,123. B.$316,225. C.$414,120. $444,510. is correct. 考点portfolio versifieVaR解析第一步,计算组合的标准差VarianceA,w2σ2+w2σ2+2×wA×wB×σA ×σB × CorrA,BVariancex,y = 0.4^2×0.07^2+0.6^2×0.05^2+2×0.4×0.6×0.07×0.05×0.2Variancex,y = 0.000784 + 0.0009 + 0.000336Variancex,y = 0.002020Stanrviation=0.002020=4.49%\text{Stanrviation=}\sqrt{0.002020}=4.49\%Stanrviation=0.002020=4.49%第二步,计算 VaRV= 1.65 x volatility x portfolio valueV= 1.65 x 0.0449 x $6mV= $444,510 老师您好,在计算组合标准差的时候,什么时候用金额*波动率,什么时候用金额占比*波动率?谢谢!
NO.PZ2019042401000041 问题如下 Analyst BOb collects the following information about assets A anBBaseon the above table, the Vof the portfolio composeof asset A anB 95% confinlevel is : A.$399,123. B.$316,225. C.$414,120. $444,510. is correct. 考点portfolio versifieVaR解析第一步,计算组合的标准差VarianceA,w2σ2+w2σ2+2×wA×wB×σA ×σB × CorrA,BVariancex,y = 0.4^2×0.07^2+0.6^2×0.05^2+2×0.4×0.6×0.07×0.05×0.2Variancex,y = 0.000784 + 0.0009 + 0.000336Variancex,y = 0.002020Stanrviation=0.002020=4.49%\text{Stanrviation=}\sqrt{0.002020}=4.49\%Stanrviation=0.002020=4.49%第二步,计算 VaRV= 1.65 x volatility x portfolio valueV= 1.65 x 0.0449 x $6mV= $444,510 所以volatility是sigma而不是sigma平方吗
NO.PZ2019042401000041问题如下Analyst BOb collects the following information about assets A anBBaseon the above table, the Vof the portfolio composeof asset A anB 95% confinlevel is :A.$399,123.B.$316,225.C.$414,120.$444,510.is correct. 考点portfolio versifieVaR解析第一步,计算组合的标准差VarianceA,w2σ2+w2σ2+2×wA×wB×σA ×σB × CorrA,BVariancex,y = 0.4^2×0.07^2+0.6^2×0.05^2+2×0.4×0.6×0.07×0.05×0.2Variancex,y = 0.000784 + 0.0009 + 0.000336Variancex,y = 0.002020Stanrviation=0.002020=4.49%\text{Stanrviation=}\sqrt{0.002020}=4.49\%Stanrviation=0.002020=4.49%第二步,计算 VaRV= 1.65 x volatility x portfolio valueV= 1.65 x 0.0449 x $6mV= $444,510u=2.4*(2.4/6)+3.6*(3.6/6)答案居然把u看作0
这题如果用(2.4^2*0.07^2+3.6^2*0.05^2+2*2.4*3.6*0.07*0.05*0.2)^0.5*1.65=0.44494966million可以吗
先求出A和B的llV然后再求portfolio的VaR可以吗? VARa=1.645*7%*2.4m VARb=1.645*5%*3.6m VARp=(VARa的平方+VARb的平方+2*VARa*VARb*correlation)开根号 这样可以吗