Cyber hackers might be holding New Zealand's stock exchange hostage.
NZX has had to halt trading for the third day in a row after its website crashed because of offshore cyber attacks.
A tech commentator predicts someone's holding it to ransom - by denying access to the website.
Paul Brislen told Phil Gifford and Simon Barnett this is a common sort of attack worldwide.
LISTEN ABOVE
Take your Radio, Podcasts and Music with you
