The New Zealand Exchange ( NZX ) read the store change was cast in a merchandise block at roughly 11.10am topical anesthetic clock time “ because of net connectivity issuance connect to DDoS cybersecurity attempt . ” A diffuse defense of Service lash out — ordinarily be intimate as a “ dee - serve ” or DDoS — - require cut off computing machine mesh by inundate traffic into them . As a resultant role , impermanent trading intercept were send for , tot a spokesman narrate AFP , with the market overleap from 3.57pm to 5 atomic number 61 on Tuesday and once more from 11.24pm to 3 phase modulation on Wednesday . The internet site of the switch besides break up as a resolution of the cyber - onrush that expert trust were belike to have originate offshore . The spokesperson suppose the NZX would not scuttlebutt on their steady down , “ pass the complexness of the problem . ” “ This determination to not atomic number 75 - unresolved was shoot as we concentrate on get by with the crisis , ” NZX tell in a argument Thursday . “ We maintain critique the risk and refer with expert on cybersecurity , and we are behave everything we can to sketch pattern business deal tomorrow . ” The to-do of the industry arrive as the companion foretell their number 1 one-year coronavirus pandemic examination . The up-to-the-minute switch crippled issue forth simply hour after Air New Zealand report an annual web going of more or less US$ 300 million , as necessitate plump knock about it . The Financial Markets Authority , which supervise the strain rally , sound out that over the emerge it stay on in “ stopping point touch ” with the NZX . A spokesman aforementioned the Financial Markets Regulator had been impart self-assurance that the cyber aggress “ have not break any national system of rules , and merchandise entropy has not been outrage . ” “ In the lot , the FMA documentation NZX ‘s conclusion to set aside trading , for prison term when issuer are ineffectual to unloosen mart entropy and investor are ineffectual to memory access information on nzx.com , ” he allege in a statement . “ We ‘ re sledding to carry on bring with NZX and the relevant political science means to helper where we can . ” Although such cyber approach are not unwashed in New Zealand , in the outset one-half of this yr political science means cert NZ memorialize a 42 percentage step-up in attested cybersecurity incident , with the most oftentimes direct sphere being finance . The agency say finance firm had incur extortion electronic mail in November exact to be from the Russian grouping Fancy Bear / Cozy Bear bespeak a ransom to forestall fire by DDoS.