156***052020-11-24 16:35:53
请问为什么说Increasing the sector diversification of the portfolio would increase the degree of cross- correlation of the portfolio(模考2),然后课后题说The correlation of two stocks in different sectors is most likely lower than the correlation of two stocks in the same sector呢?这两个不矛盾吗?
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开开2020-11-24 17:33:05
同学你好,在sector diverdification之前,portfolio是集中押注某些sectors的,是很不均衡的, 不同sector之间的的股票correlation较低。这少数的几个sector它们整体的cross-correlation要比,sector 充分diverdification之后,持仓的cross-correlation会提升。
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