of a stock is how much it reacts to movements in the market portfolio.

一只股票风险指标β系数直接反应出，The，β,市场组合变动与投资收益的相关性。

耶鲁公开课 - 金融市场课程节选

We'll be talking about the Modigliani-Miller Theorem and related issues in this lecture as well as something about the behavior of the stock market and its tendency to go through dramatic movements.

我们会讲到,MM定理,和与其相关的问题,还会讲到,股市行为和,股市戏剧性的运动趋势

耶鲁公开课 - 金融市场课程节选