Atrios sums it in his usual succinct manner:
Dow down 512 points. Haven't had such an exciting day at the dog track for awhile.I point out in the comments that this would be a good time for all to remember that the Republicans want Social Security privatized, so that all retirement savings get on this same roller-coaster! We can watch elderly acrobats and tight-rope walkers cope with the uncertainty that even a Democratic president tells us firms (who get rewarded for risk-taking) shouldn't have to face.