Software problem sparked NYSE trading outage

(AFP)
(AFP)

New York - The New York Stock Exchange said its nearly four-hour trading halt on Wednesday resulted from a technical problem that stemmed from new software rolled out the previous evening.

The unit of Intercontinental Exchange said on Thursday that the glitch caused communication problems between one of its trading units and NYSE customers as they began connecting to the exchange at 7 a.m. EDT (1100 GMT) on Wednesday morning.

NYSE said it attempted to fix the problem before the market opened, but customers were still reporting "unusual system behavior" mid-morning, and it decided to halt trading.

The exchange said it then began cancelling all open orders and reaching out to its customers as it worked to solve the problem.

Trading in NYSE-listed stocks continued uninterrupted on other exchanges. The NYSE came back online shortly after 3 pm, once the technical issues had been resolved.

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