Well, builders can sell for a really high price, so they start building a lot of houses.

建造商能以高价将房屋卖出,所以他们广建新房

耶鲁公开课 - 金融市场课程节选

When you buy high and sell low it's really hard to generate returns, even if you do it with great enthusiasm and great volume.

当你高价买入低价卖出时,是很难产生回报的,不管你有多大交易热情或有多大交易量

耶鲁公开课 - 金融市场课程节选