Jamie Dimon and JPMorgan Chase building
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JPMorgan shares dive after $2bn trading loss

JPMorgan Chase, the biggest US bank, has revealed a surprise trading loss of at least $2bn (£1.2bn) on complex investments made by its traders.

Chief executive Jamie Dimon blamed "errors, sloppiness and bad judgement" for the losses and warned "it could get worse".

The risky hedging strategy could cost the bank an additional $1bn, he added.

Hugh Pym reports.