由无差异曲线看杨义群的风险偏好和知识水平！ [推广有奖]

杨义群，只要你不老老实实搞研究，搞分析，胆敢整天喊口号，我就会揭你的老底！

某导，脑袋肿没有呀！

本人金融学生，底子也不算扎实，但是直觉上认为，杨的这个例子本身举得有个问题。

Risks are the probability of loss. But in his example, the returns are all positive. Therefore, evaluating risks is nonsense as investors have no chance to lose money. In his example, obviously, we can just choose the fund with higher returns.

Also, we can see that his return numbers have a thing that upperside and downside have equal distance to their mean. If we set a negative return following Yang's rule, we can find all mean returns are 0, and all Sharpe Ratios are 0.

不多说，你们自己看。。。