The capital asset pricing model was not intended to be a positive theory of equilibrium in capital markets, but rather a normative theory of how prices should behave if investors acted in a certain way.
资本资产定价模型并非旨在成为资本市场的实证均衡理论，而是一种规范性理论，描述如果投资者以某种方式行事，价格应如何表现。
The world is a book, and those who do not travel read only one page.
I don't rap for the sake of rapping. I rap to make people think.