问题如下图:
选项:
A.
B.
C.
解释:
老师你好,之前解释中出现的covariance不知道是从何得知的呢?我的理解是0到-1那么说明这组数据的关联性增强了,既然关联性曾强了,那么is less diversify , and has decreased diversificatin benefit. 如果理解不对,请麻烦老师解释一下。(请不要复制粘贴以前的解释,因为都没看懂)
星星_品职助教 · 2019年10月31日
同学你好,
correlation从0到-1确实说明线性相关性在增强,不过这个相关关系是负的,就相当于第一个资产收益增加,第二个就要下跌,而且随着ρ逐渐从0变动到-1,第二个收益率下跌的就越厉害。所以说明分散化的效果越好。可以从这个角度理解,如果第一个资产亏损了,意味着第二个资产就赚了,而且随着ρ的向-1逐渐变动,第二个资产赚的会越来越多,可以更好的去抵消第一个资产的亏损。
其实从公式的角度直接去理解会更为直接。观察两资产组合方差公式,如果ρ=0,相当于没有最后一项,如果ρ<0,相当于最后一项从0变为一个负值,整个组合的方差也就是风险是变小的,即为更小的风险和更大的分散化效果。加油
NO.PZ2018062016000071 问题如下 When the correlation between two stocks creases from 0 to -1, the versification benefit will: A.increase. B.crease. C.remain the same. A is correct. the correlation between two stocks creases, versification effemenhananversification benefit will increase. analyst gathers the following information:Whisecurity hthe highest totrisk?
NO.PZ2018062016000071 问题如下 When the correlation between two stocks creases from 0 to -1, the versification benefit will: A.increase. B.crease. C.remain the same. A is correct. the correlation between two stocks creases, versification effemenhananversification benefit will increase. 这个问题考的概念是不是就是correlation coefficient的绝对值越大,线性关系越强?
NO.PZ2018062016000071 问题如下 When the correlation between two stocks creases from 0 to -1, the versification benefit will: A.increase. B.crease. C.remain the same. A is correct. the correlation between two stocks creases, versification effemenhananversification benefit will increase. 如果说correlation,p 从0 变成了-1 ,虽然说他们之间的相关性变的很强了,但是是inverse的,所以是对投资分散有好处,是这样理解吗?
NO.PZ2018062016000071 问题如下 When the correlation between two stocks creases from 0 to -1, the versification benefit will: A.increase. B.crease. C.remain the same. A is correct. the correlation between two stocks creases, versification effemenhananversification benefit will increase. 这个题目这里,variance下降,说明组合versification分散,风险低。但是离散程度跟这个题目有关吗这两个概念有点模糊感谢回答
NO.PZ2018062016000071 问题如下 When the correlation between two stocks creases from 0 to -1, the versification benefit will: A.increase. B.crease. C.remain the same. A is correct. the correlation between two stocks creases, versification effemenhananversification benefit will increase. 我没有看到这个概念的出现,请问分散化和离散化在这里是不是两个概念?这个vers在这里具体的含义是什么?另外,如果按照答案理解,或者您关于前面几个提问的回答,这道题是不是可以理解为\"对冲效果\"最好?