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
Pattern day trader Pattern day trader Pattern day trader is a FINRA designation for a stock market trader who executes four or more day trades in five business days in a margin account, provided the number of day trades are more than six percent of the customer's total trading activity for that same five-day period. A FINRA (formerly National Association of Securities Dealers, Inc. or NASD) rule applies to any customer who buys and sells a particular security in the same trading day (day trades), and does this four or more times in any five consecutive business day period; the rule applies to