NO.PZ2015121801000040
问题如下：
With respect to capital market theory, which of the following asset characteristics is least likely to impact the variance of an investor’s equally weighted portfolio?
选项：
A.Return on the asset.
B.Standard deviation of the asset.
C.Covariances of the asset with the other assets in the portfolio.
解释：
A is correct.
The asset’s returns are not used to calculate the portfolio’s variance [only the assets’weights, standard deviations (or variances), and covariances (or correlations) are used].
如题。。。。。。。。。。。。。。
当n趋近于无穷大的时候，方差前面的系数1/n趋近于0，所以说影响因素近乎只有协方差。