Citigroup says trader made error behind ‘flash crash’ in Europe

Inputting mistake led to suspension of trading on several markets after sudden steep falls

The US bank Citigroup has said that one of its traders made an error when European stock markets suffered a flash crash" on Monday.

Trading was briefly suspended in several European markets on Monday morning, after leading share indices recorded sudden steep declines. One of the hardest hit was Sweden's benchmark OMX 30 index, which fell by nearly 8%, but recouped most of the losses and ended the day 1.9% lower.