The US tax code, as evidenced by FBAR and FATCA, assumes that the only purpose of any financial transaction or account outside the US, is to hide money from the IRS. You have to report each and every "account", with contact details at the institution, every year, on two independent forms (similar yet different), as well as every transaction in securities (if you can actually do them anymore - most places won't even let you if they know you are paying taxes in the US).
If you are not a US taxpayer already and planning to do anything in the US, be sure to talk to a CPA that specializes in those kinds of things (preferably, one who is also familiar with the treaties and tax code in the country you are moving from). You need to do this both on the business front and the personal front, or you are likely to be seriously and horribly surprised one day.