FILE PHOTO: Rohan Ramchandani, former London-based trader for Citigroup Inc,

FILE PHOTO: Rohan Ramchandani (center), former London-based trader for Citigroup Inc, exits the U.S. Federal Court in Manhattan following a hearing for conspiring to rig prices in the foreign exchange market in New York City, U.S., July 17, 2017. REUTERS/Brendan McDermid/File Photo