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請問在原版書中 reading 25. Q6. 的解答中 Active risk is affected by the degree of cross-correlation. The correlation of two stocks in different sectors is most likely lower than the correlation of two stocks in the same sector. Therefore, the correlation of the energy/financial pair is most likely lower than that of the automobile/automobile pair. Because both positions were implemented as an overweight and underweight, the lower correlation of the two stocks in the new position should contribute more to active risk than the two-stock position that it replaced. cross-correlation 越低不是代表 risk to the total portfolio 越低嗎? 為什麼是 contribute more to active risk than the two-stock position that it replaced? 請問是因為 portfolio beta 偏離了 benchmark 的關係嗎?
已回答老师,putable对投资者有利,而callable对公司有利,公司可以在股票价格较高的时候以低价格买回股票,这样投资者不就亏损了,所获得的利益也就更低了,为什么不选putable common share呢?
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