Attitudes are sort of simplification and data compression the brain uses for drawing simple conclusions from many impressions. Experiments show that it not only takes lots of new information to change an attitude, but also a lot of time — typically at least months. However, a panicky person — a person so struck by what happens that he has a high beartbeat, sweaty palms, and acute concentration problems — can change attitudes within minutes or even seconds. When millions of investors get caught in panic, they react much faster than normal, and this creates the free fall in prices. Resistance, when this happens, is more than difficult. It’s futile.

Supertrends by Lars Tvede

立场，是大脑接收大量信息之后，将数据简化提炼，得出的精简结论。很多实验证明，要改变一个人的立场，不仅需要大量的新鲜信息，还要旷日持久——起码要几个月。但是，如果这个人心慌意乱——被突发事件打了个措手不及、心跳加速、手心出汗、惊慌失措——那改变立场只需要几分钟甚至几秒钟。几百万投资者恐慌时，他们的决策时间比平时快得多，这也导致了股价崩盘。这种情况一旦发生，想要不为所动更是难上加难。无药可医。