The New York Stock Exchange halted stock trading at midday but resumed an hour later following computer problems.
Trading was halted at 1:16 p.m. ET, the exchange said. Other U.S. stock exchanges, including the Nasdaq and regional exchanges affiliated with the NYSE, were unaffected.
By 2:15 p.m. ET, trading had resumed, with the Dow Jones Industrial Average up 60 points on light trading. The tech-heavy Nasdaq gained 28 points, as the S&P 500 index added 10.
A faulty network switch was responsible for the brief shutdown, according to a spokesman for the NYSE. The switch was replaced, he added.
Reuters contributed to this report.