NEW YORK (Reuters) - U.S. stocks plunged on Thursday, with the Nasdaq suffering its worst day since November 2011 as investors again sold high-flying names in the technology and biotech sectors.
The Dow Jones industrial average fell 266.96 points or 1.62 percent, to end unofficially at 16,170.22. The S&P 500 lost 39.09 points or 2.09 percent, to finish unofficially at 1,833.09. The Nasdaq Composite dropped 129.794 points or 3.1 percent, to close unofficially at 4,054.106.
(Reporting by Angela Moon; Editing by Jan Paschal)