Former trader Jerome Kerviel (R) and his lawyer David Koubbi leave the Fleury-Merogis prison near Paris September 8, 2014. The French trader Jerome Kerviel, who was sentenced in May to three years in jail over trading that lost his bank billions of euros, won a court battle that will allow him to leave prison today as long as he respects home curfew rules. Kerviel, convicted after losing Societe Generale 4.9 billion euros ($6.4 billion) in 2008 with a pileup of trades that went wrong, walked free on September 8, and will wear an electronic bracelet that will allow him to go to work during the day but will alert authorities if he tries to leave home between 8.30 p.m. and 7 a.m. REUTERS/Philippe Wojazer (FRANCE - Tags: BUSINESS CRIME LAW TPX IMAGES OF THE DAY)