If you click on Edgar you can enter the name of any public company in the United States and then all of its filings are online and you can find out an incredible amount of information about companies.

点击那个链接,你可以输入,任何一间美国上市公司的名字,所有的资料都在网上,你可以找到有关这间公司的,大量信息

耶鲁公开课 - 金融市场课程节选