Also, we need to know how much individual stocks are correlated with rm; we measure that by the regression coefficient.

我们必须清楚,有多少个股与市场总体收益率相关;,我们用回归系数，即β系数来表示。

耶鲁公开课 - 金融市场课程节选

It's the world portfolio, it's everything and we compute the expected return on that portfolio, rm that's rm.

这就产生了世界投资组合,然后我们在此基础上计算出预期收益，所得值就是。

耶鲁公开课 - 金融市场课程节选