Buy low and sell high. It's pretty simple. The problem is knowing what's low and what's high.
投资就是低买高卖,相当简单。问题是要知道什么是低,什么是高。
理解布莱克-斯科尔斯模型的关键在于认识到它是基于对冲以消除风险的理念。
Power is not a means; it is an end. One does not establish a dictatorship in order to safeguard a revolution; one makes the revolution in order to establish the dictatorship.