Quote from MrPowerBallad:
They made a big deal about including some sort of wording about preventing US citizens from avoiding the tax by trading on non-US exchanges -- I guess this is what they were thinking of:
`(a) In General- In the case of any outbound securities transaction, the transferor shall deduct and withhold a tax equal to the tax imposed under section 4475 with respect to such transaction.
`(b) Outbound Securities Transaction- For purposes of this section, the term `outbound securities transaction' means any covered transaction to which section 4475(a) applies if--
`(1) such transaction does not occur on a trading facility located in the United States, and
`(2) the purchaser with respect to such transaction in not a United States person.'.
Nope, this simply means US transaction taxes will apply to non-US citizens also if they trade US securities elsewhere.