—— 请按键盘 空白键 开始游戏 ——

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。
导演中最重要的就是对你想要实现的目标有一个清晰的愿景。
In times of crisis, true leaders emerge by staying calm, focused and decisive.
The best time to plant a tree was 20 years ago; the second-best time is now.