资本资产定价模型(CAPM)是理解风险-回报权衡的有用工具,但它并非对现实的完美描述。
The only thing that can make you a champion is your determination.
Every performance is a new beginning.
相关系数的可能误差不是一个固定的量,而是取决于样本的大小。
In science, we try to explain what we don't understand. In mathematics, we try to understand what we can't explain.