The NZX blamed an annual test of its technology back-up plans for a glitch that prevented company announcements from displaying on its website on Monday morning.

The fault prevented investors from viewing announcements including Contact Energy’s annual result and a profit warning from My Food Bag on the NZX’s usual website.

Spokesman Simon Beattie said announcements were available on its back-up site, announcements.nzx.com.

Beattie said the NZX had switched to its secondary data centre over the weekend as part of its annual testing programme and experienced a temporary issue displaying announcements.

The fault appeared to be fixed prior to trading opening on the NZX at 10am.