Fourth JPMorgan trader is in US sights

A fourth JPMorgan trader in London is being investigated by US regulators over the £3bn losses incurred by the bank's London Whale Bruno Iksil.

Fellow Frenchman Julien Grout worked as a trader in the chief investment office and reported to Mr Iksil, the French credit trader who is a central figure in the federal inquiry. He still works for the bank but is reported to have hired a lawyer to represent him. Mr Grout joined the bank in 2009.