Trading will resume on the NZX this afternoon after a technical fault halted all activity.
In the second major outage this year, the exchange operator was forced to suspend trading as the source of the problem was investigated.
However, it has now issued a statement saying that its "connectivity issues have been resolved".
"Trading in all markets will resume from 3pm," it said.
Activity has been moved to a secondary site, it added. The company also said a number of systems and users will be affected, including X-stream Front End Users, FIX Message users, and ISV's connecting to FIX Gateways.
The NZX experienced connectivity issues on a number of its systems around 12pm today, and decided to halt all trading. It will also file a report to the Financial Markets Authority and market participants on the cause of the problem.
In April, the Wellington-based company kept trading open when problems with its data feed kept retail investors in the dark over market announcements and live pricing.
The NZX launched the NASDAQ OMX X-stream trading platform last November as it looks to branch out into new securities trading, including derivatives and commodities.
The stock exchange had a major IT glitch in 2010 when failures in multiple hardware services disrupted index feeds until midday, meaning index pricing, such as the benchmark NZX 50 Index, was not available in morning trading.