The Dow Jones Industrials fell 313 points (2.36%), the worst day for the Dow this year. Also, the S&P 500 fell 2.37%, while the NASDAQ fell 2.48%.
UPDATE: CNBC reports:
Markets have performed unfavorably both days following Obama’s presidential victories. In fact, back on Nov. 5, 2008 — the day after Obama was first elected — the Dow closed down almost 500 points.
Excluding 2008, the only other time stocks have performed as poorly the day after a presidential election in the last 60 years was on Nov. 3, 1948, when the Dow dropped 3.85 percent as Harry Truman claimed victory over Thomas Dewey.
Thus, the three worst post-election days since World War II are 2008 (Obama), 1948 (Truman) and 2012 (Obama).