But India's diamond center is now desolate. Merchants in the once busy trading city say they have transacted virtually no business since last Christmas as orders dry up from Western buyers, who bought nearly 90 percent of their stones.

VOA: standard.2009.04.03

The trading commissions will eat up all of your profits and professionals know that, so it's bad behavior.

交易佣金会吃掉你所有的利润,内行人知道这点,这是不道德的行为

耶鲁公开课 - 金融市场课程节选

It's one of the most rapidly changing, hard to keep up with areas because someone can set up an electronic exchange overnight and suddenly become a base for trading trillions of dollars of securities.

经纪业是一个变化最快的行业之一,人们很难跟上它的步伐,因为人们可以在头一天晚上,设置一个电子交易,一夜之间,他就能在证券市场赚到千亿美金

耶鲁公开课 - 金融市场课程节选