NYSE: Bad software reason for outage
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NEW YORK – The New York Stock Exchange said an outage of more than three hours was caused by problems associated with a software upgrade on the exchange’s computers.
The NYSE said in a statement Thursday the upgrade caused communication problems between its trading software and other systems, causing customers’ orders to not go through.
The problem became severe enough by late morning Wednesday the exchange decided to suspend trading at 11:32 a.m. so the problem could be addressed. Orders were cancelled, trading software was restarted and backup units were brought online, the exchange said.
The exchange restarted trading at 3:10 p.m.
Wednesday’s shutdown was a black eye for the NYSE, but ultimately it did not broadly impact Wednesday’s trading. The Nasdaq still operated normally and several other exchanges were also available for investors to execute trades while the NYSE worked through its problems.
The outage came at a time when traders had plenty of other things to worry about. There were concerns about China’s plunging stock market and a logjam in talks between Greece and its creditors that weighed on investors’ mood all week.