The New York Stock Exchange unexpectedly shut down trading in all of its listed stocks late Wednesday morning.
The exchange did not immediately give an explanation for what caused the shutdown. In an alert on its website, it wrote: “Additional information will follow as soon as possible.”
The New York Stock Exchange, which is now owned by Intercontinental Exchange, has had, like other stock exchanges, technical difficulties in the past, but the scale of the problem on Wednesday has little precedent.
Nearly 45 minutes after the shutdown, there was still little clarity on what was causing the problem. Stocks listed on the New York Stock Exchange continued trading on other exchanges, such as Nasdaq.