来自《耶鲁大学开放课程：金融市场第4集第4集》

and, very often, financial risk management is part of the thing

而多数情况下金融风险管理
that prevents that from happening.

可以防止这种情况发生
The first--let me go--

首先我想说...
I want to start this lecture with some mathematics.

这堂课我想从一些数学问题讲起
It's a continuation of the second lecture,

作为第二节课内容的延续
where I talked about the principle of dispersal of risk.

当时我讲过关于风险分摊的原则
I want now to carry that forward into something

现在从这个基础上拓展一下
a little bit more focused on the portfolio problem.

更侧重于投资组合方面的问题
I'm going to start this lecture with a discussion of

首先我想讲讲
how one constructs a portfolio

怎样建立一个投资组合
and what are the mathematics of it.

以及与其有关的数学问题
That will lead us into the capital asset pricing model,

然后引出资本资产定价模型