Quote from vhehn:
most american companies serve a worldwide market. in this case a weak dollar is a bonanza to them.
The problem is the US economy is import oriented (think trade balance), US equities are foreign investment supported (think net TIC), etc... The week dollar is good for American companies, but bad for foreign companies. If the US keeps beggar-thy-neighboring the rest of the world with dollar devaluation, it will come back to bite it in the ass in an extreme way...