布莱克-斯科尔斯公式的美妙之处在于它仅依赖于一个不可观测的参数,即股票的波动率。
世界是一面镜子,我们在其中看到自己。
History is not just about facts, but about the shadows between them.
The rich are different from you and me—they have more money and less empathy.