All trading has halted on the New York Stock Exchange, and the NYSE would like everyone to know that it’s the result of an internal technical screwup and not a cyberattack.

The NYSE stopped trading all securities around 11:32 am, without much explanation about what went down. Since no one exchange handles more than 16% of trading, this isn’t a catastrophe by any means, but it’s still an unusually severe system failure.

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“We’re experiencing a technical issue that we’re working to resolve as quickly as possible. We’re doing our utmost to produce a swift resolution & will be providing further updates as soon as we can,” the NYSE said in a statement. It went on Twitter to refute rumors that the shutdown was a result of a cyberattack:

Homeland Security Secretary Johnson also made a point to rule out “nefarious” activity as the cause of the mysterious glitch.

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According to Bloomberg, it appears NYSE is preparing to reopen, though it hasn’t clarified exactly what caused the glitch.

China’s stock exchange melted down yesterday as well, but the events appear unrelated, since in China the exchange halt was due to nosediving prices and not any technical problem. United Airlines also struggled through a disruptive technical failure today and insists that it wasn’t hackers. It’s good that today isn’t a bellwether day for cyberattacks. But if these are truly just major internal errors, it’s a bellwether day for exposing how fallible large-scale tech systems are, which is nothing to celebrate.

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Update 2:08 pm: NYSE President Tom Farley told CNBC that trading is expected to resume between 2:45 and 3 pm.

Update 3:07 pm: The AP is reporting a 3:10 pm reopening time.

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[Bloomberg | Washington Post]


Contact the author at kate.knibbs@gizmodo.com.
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The NYSE as of 12pm today. Image: Twitter