The stock exchange was forced to halt equity trading for several hours on Wednesday due to persistent technical snags.
Shares of CrowdStrike plunged 13% on Monday, extending their loss-making streak, after Wall Street analysts downgraded the stock on concerns over the financial fallout from a global cyber outage last week.
Cybersecurity firm Okta said an unidentified hacker had accessed the company's support system and viewed client files.
