Interactive: the forex inquiry network

By John Burn-Murdoch and Daniel Schäfer

US, UK and Swiss regulators on Wednesday slapped $4.3bn in penalties on six banks including UBS and Citi in the first cases to come out of a global probe into allegations of widespread rate-rigging in the foreign exchange markets. So who are the key figures investigators have focused on? The FT explains which banks and bankers have been swept up in the inquiry and their ties.