The claim is, I can write any vector you give me as a real scale i plus a real scale j.

也就是说,我可以把任何你给我的矢量,写成 i 和 j 的实系数线性组合的形式

耶鲁公开课 - 基础物理课程节选

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

The first question is, what's the beta of the Yale portfolio?

第一个问题是,耶鲁投资组合的beta系数是多少

耶鲁公开课 - 金融市场课程节选

That's not a way that we really think about it, but I do believe that the risk level of the University's portfolio is really quite low in statistical terms -much lower than the risk level that you'd have if you had a traditional portfolio dominated by marketable securities.

这一般不是我们考虑的关键,但我相信,耶鲁投资组合的风险水平,在统计数字上是非常低的,远远低于,持有一个传统的可交易证券主导的,投资组合的beta系数

耶鲁公开课 - 金融市场课程节选