If you buy stock in a high tech company, that sells things on the internet, you might expect it to fluctuate enormously.

如果你选择买在网上进行销售的，高新技术公司的股票，它可能会变化非常大。

麻省理工公开课 - 计算机科学及编程导论课程节选

Technically, Fannie and Freddie are private companies -they're traded stocks; you can buy shares in Fannie and Freddie.

技术上,房利美和房地美都是私人公司,它们的股票可流通,你可以购买房利美和房地美的股票

耶鲁公开课 - 金融市场课程节选