正文
I think that's what models are good for in finance. In most cases the world doesn't really behave
in exactly the way as the model you've constructed. You're trying to make a poor approximation
of reality, though it has big advantages. You can ask, "What happens if volatility goes up or
interest rates go down?" It allows you to stress-test your view of the world in some way and then
come up with a price based on what you can understand.
世界并不像模型那样进行演化，即使对世界进行一个略微近似的模拟也有了一个很大的帮助。给你一个不同的思路观察这个世界。
2. how a good trader do with a good model
