Last week and the beginning of this week, New Zealand's stock exchange was hit by Distributed Denial of Service attacks which impacted its service.
Created: September 1, 2020
References:

• https://grassrootsecurity.com/2020/09/01/new-zealand-stock-exchange-hit-by-distributed-denial-of-service/
• https://www.stuff.co.nz/business/industries/122611626/stockmarket-website-crashes-but-trading-continues-without-a-blip-nzx-says
• https://blogs.akamai.com/sitr/2020/08/ransom-demands-return-new-ddos-extortion-threats-from-old-actors-targeting-finance-and-retail.html
• https://www.ncsc.govt.nz/newsroom/general-security-advisory-ongoing-campaign-of-dos-attacks-affecting-new-zealand-entities/