没看懂的公司比较容易鉴别，就是股价一掉你就想卖，涨一点点你也想卖的那种。看懂的那种大概就是怎么涨你都不想卖，大掉时你会全力再买进的那种。

Companies you don't understand are easy to identify: when the price drops you want to sell, when it rises a bit you also want to sell. The ones you understand: no matter how much they rise you don't want to sell, and when they drop big you want to buy more.

不懂不做，这是我投资的第一原则。

如果你不能用几句话讲清一家公司的生意，就别投它。

If you can't explain a company's business in a few sentences, don't invest in it.

不懂企业最好就是不要碰。你如果不懂投资，那就应该买标普500指数。