Companies are typically based on two basic information that is, the standard deviation and coefficient of variation can make decisions on the investment of these securities. The higher the risk of SD measurement data, the higher the risk, the risk is greater. Therefore, compared to the AP, the ability to meet the low risk of investment. In addition, a comparison between the cov is the move and the variation of the expected return rate of investment. From here we can see the bad stock does not AP, there will be many reasons for the benefits, they provide more profit margins lower risk ap. In short, the company should not invest.
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