At the closing bell, the Dow Jones Industrial Average fell 267 points to finish at 16,169.90. The Nasdaq fell 129 points to finish at 4,054.11, while the S&P 500 dropped 39 points to 1,833.09.
Markets plunged on Thursday despite positive economic data on unemployment benefits. The number of Americans filing new applications for unemployment benefits has fallen to its lowest level in almost seven years. The Nasdaq had its worst day since 2012 as biotech and online firms slumped the hardest.