People: David Puth, Global head of foreign exchange and managing director of credit and rates, JPMorgan Chase

Some of JPMorgan's foreign exchange staff in London were bound to be unnerved when they heard that the big cheese from New York was moving across the Atlantic.

They must have wondered what they were doing wrong, or possibly right, to trigger this extra involvement from David Puth, the bank’s global manager of foreign exchange and commodities. Was he arriving to decide which resources to add in Europe, or which to cut? Was he planning to shake up the London management team?

Puth, who is also a managing director for the bank’s credit and rates division, was already well known in the London office, having spent one week out of four there for over a year.

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