Citigroup Sales Hit European Stock Markets With ‘Flash Crash’

Several European stock markets suffered a “rapid crash” on Monday morning following a sell order by Citigroup Inc., according to people familiar with the matter.

Trading halted in some markets after major stock indexes plunged for several minutes just before 10 a.m. Central European time. Stocks in the Nordic region were hit the hardest, although other European stocks also fell rapidly in a day as share prices globally fell.