Iain:
It’s notoriously difficult to link specific pieces of news to market moves, but for whatever it’s worth, the standard AP wire story links today’s market decline to the very bad economic news that has come out today.
As I indicated in an earlier post, this past Monday is about as close as you get to a natural experiment that would enable a conclusion about causation, and it strongly indicates that the market declined on Monday in response to the House vote.