Traders 'banned from bank chat rooms' As well as probing Libor, regulators in the UK, Europe and the US are investigating allegations that banks rigged currency trades in order to make a profit. Around 15 banks are being investigated and more than 10 traders are believed to have been suspended in relation to their use of chat rooms to broadcast sensitive information. Other banks believed to be reviewing the use of chat systems are JPMorgan, Credit Suisse and UBS. "Don't exaggerate, don't ruminate, don't bull****," Mr Dimon told employees at gathering at the bank's office in London's Canary Wharf.