The key to understanding the Black-Scholes model is to recognize that it is based on the idea of hedging to eliminate risk.
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。
沉默是快乐的最佳使者：如果我能说出多少，我就不会那么快乐。
The stranger is close to us, insofar as we feel between him and ourselves common features of a national, social, occupational, or generally human, nature. He is far from us, insofar as these common features extend beyond him or us, and connect us only because they connect a great many people.
Your so-called boss may own the clock that taunts you from the wall, but, my friends, the hour is yours.