How much notice do you have to give? branched chain amino acids amazon Bruno Iksil, the trader whose big bets earned him the nickname London Whale, has signed a cooperation agreement with prosecutors and has not been charged with any wrongdoing. Two other traders who worked with Iksil in London, Javier Martin-Artajo and Julien Grout, have been criminally charged by U.S. prosecutors over their role in the scandal, accused of trying to hide the mounting losses.