Twitter popped, but the rest of the market dropped.
Twitter wowed investors, surging 73 percent on its first day of trading. The broader market, however, had its worst day since August as traders worried that the Federal Reserve could cut back on its economic stimulus.
The Dow Jones industrial average fell 152.90 points, or 1 percent, to close at 15,593.98.
The Standard & Poor's 500 index lost 23.34 points, or 1.3 percent, to 1,747.15
The Nasdaq composite dropped 74.61 points, or 1.9 percent, to 3,857.33.
For the week so far:
The Dow is down 21.57 points, or 0.1 percent.
The S&P 500 is down 14.49 points, or 0.8 percent.
The Nasdaq is down 64.71 points, or 1.7 percent
For the year so far:
The Dow is up 2,489.84 points, or 19 percent.
The S&P 500 is up 320.96 points, or 22.5 percent.
The Nasdaq is up 837.82 points, or 27.8 percent.