Due to a glitch in the New York Stock Exchange's system, trading was extended 15 minutes beyond the traditional closing time of 4 p.m. to ensure all trading orders were executed.
The Dow Jones industrial average <.DJI> dropped 223.32 points, or 2.63 percent, to close unofficially at 8,280.74. The Standard & Poor's 500 Index <.SPX> fell 26.87 points, or 2.91 percent, to 896.46. The Nasdaq Composite Index <.IXIC> lost 49.20 points, or 2.67 percent, to 1,796.52.
(Reporting by Rodrigo Campos; Editing by Jan Paschal)
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