生活中唯一真正的失败是不忠于自己所知道的最好的东西。
The only real failure in life is not to be true to the best one knows.
"The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion."
The past is a foreign country; they do things differently there.
布莱克-斯科尔斯模型的美妙之处在于它将期权定价问题简化为估计几个关键参数，尤其是波动率。