And chase the frothy bubbles, While the world is full of troubles. --- William Butler Yeats 最近有许多投资人跟我聊到股票市场，劈头盖脸都要来一句：股市（指美股）有泡沫啊，看着慌。我对此只能不置可否。倒不是我强烈反对美股有泡沫；我只是比较奇怪，为啥你可以如此轻...