Bankers from Hong Kong and Dubai to South Africa and London were caught up in the global IT outage, leaving some unable to log on to computer systems and hobbling others from making trades.
Some staffers at banks including JPMorgan Chase, Nomura Holdings, and Bank of America were unable to log on to their firms' systems today, with many met with a blue error screen.
At Haitong Securities, one of the trading desks was out of action for about three hours.
In Norway, the central bank said it would have to conduct a banking system liquidity auction via email and over the phone due to problems with its online system.