Not to be mean...but if this is the case then those buyers were fools. The plan hasn't even been presented to Congress yet.
You've heard the term "buy on rumor". Well, the people who bought the last 2 days trust all the reports that say there is fairly good bi-partisan support behind the plan.
They may not be fools. If the plan is announced it may then be too late to get into stocks at such a low price.