NYSE suspends trading: 'All open orders will be cancelled'

NYSE hacked by Anonymous, China — The NYSE has temporarily suspended trading in all symbols Reuters

The New York Stock Exchange (NYSE) has suspended all trading after it experienced some unspecified technical issues.

At around 11.30am New York time, the NYSE said: "NYSE/NYSE MKT has temporarily suspended trading in all symbols. All open orders will be cancelled."

It later tweeted they were working to resolve the problem, adding this was not the result of a cyberattack.

NYSE tweeted:

(1 of 3) The issue we are experiencing is an internal technical issue and is not the result of a cyber breach.
— NYSE (@NYSE) July 8, 2015

(2 of 3) We chose to suspend trading on NYSE to avoid problems arising from our technical issue.
— NYSE (@NYSE) July 8, 2015

The so-called Big Board added its NYSE Arca and NYSE Amex/Arca Options exchanges were not affected and were fully functioning.

(3 of 3) NYSE-listed securities continue to trade unaffected on other market centers.
— NYSE (@NYSE) July 8, 2015

US officials confirmed to CNBC there was no indication the NYSE was targeted by hackers.

BREAKING: 2 US officials tell NBC News NO indication that computer issues at NYSE & $UAL are related or a cyberattack http://t.co/jvkuQmCl7n
— CNBC Now (@CNBCnow) July 8, 2015

About an hour before the first communication was made, it reported some prior technical issues had been resolved and all systems were functioning normally with a few exceptions.

Separately, the New York-based Nasdaq exchange said it was operating without any problems.

Nasdaq systems are operating normally and are trading all symbols including Tape A (NYSE) securities.
— Nasdaq (@NASDAQ) July 8, 2015

Earlier on 8 July, a computer system glitch forced United Airlines to ground all its flights in the US, a coincidence quickly brought up online, as the Wall Street Journal was also experiencing some issues.