That's so basic, it must have happened a million times and that's the basic idea of the stock market.

这是很基础的概念,早已屡见不鲜,而这就是股票市场的最初思想

耶鲁公开课 - 金融市场课程节选

I want to talk about the stock market today and I thought I would keep it more or less basic because I think-- I want to emphasize basic concepts.

今天我想讲一些股票市场的内容,我想多讲些基础的内容,因为我认为基本概念很重要

耶鲁公开课 - 金融市场课程节选