Jérôme Kerviel Jérôme Kerviel Jérôme Kerviel (; born 1977) is a French trader who was convicted in the 2008 Société Générale trading loss for breach of trust, forgery and unauthorized use of the bank's computers, resulting in losses valued at €4.9 billion. Société Générale characterizes Kerviel as a rogue trader and claims Kerviel worked these trades alone and without its authorization. These assertions have been met with skepticism by some of Kerviel's former colleagues and acquaintances, as well as by some members of the news media. Kerviel had told investigators that his trading behavior was widespread at the company and that making
Rogue trader Rogue trader A rogue trader is an employee authorized to make trades on behalf of their employer (subject to certain conditions) who makes unauthorized trades. It is most often applied to financial trading, when rogue professional traders make unapproved financial transactions. This activity is often in the grey area between civil and criminal transgression, because the perpetrator is a legitimate employee of a company or institution, yet enters into transactions on behalf of their employer without permission. In several cases traders have initially made very large profits for their employers, and bonuses for themselves, from trades in breach of the