不是我说的，是Mark Minervini 说的 :-) 从心理上讲，一半是双赢

If you are indecisive with a trade sell half. When you sell half, if the stock goes higher you say to yourself, “Thank goodness I kept half.” If the stock goes lower, you’ll say, “Thank goodness I sold half.”  Psychologically, half is a win/win. No other amount accomplishes this.

如果您对交易犹豫不决，请卖出一半。当你卖出一半时，如果股票走高，你会对自己说，“谢天谢地，我保留了一半。如果股票走低，你会说，“谢天谢地，我卖了一半。从心理上讲，一半是双赢。没有其他数量可以做到这一点。