The wisest rule in investment is: when others are selling, buy. When others are buying, sell. Usually, of course, we do the opposite. When everyone else is buying, we assume they know something we don't, so we buy. Then people start selling, panic sets in, and we sell too.

投资中最明智的规则是:当别人抛售时，买进。当别人买进时，卖出。当然，通常我们会做相反的事情。当其他人都在买东西时，我们假设他们知道一些我们不知道的东西，所以我们买了。然后人们开始抛售，恐慌袭来，我们也开始抛售。