Well, we know what he looks like now, and that he was on a salary of around 100,000 Euros, bonus included, and that he didn't enrich himself in the process. With thanks to the FT for the shot.
Update:
Also we know that he completed a Masters of Market Finance (specialising in Market Operations) from the Lyon 2 University in France, and has been employed as a Trader at Delta One Products, a SocGen subsidiary since 2000. (from a Wink.com search)
Update 2: Again from the FT; Jean-Pierre Mustier, Head of Investment Banking at SocGen on how he did it:
Jean-Pierre Mustier, head of investment banking who had been seen as a potential successor to Mr Bouton, said the position occupied by the rogue trader was only expected to generate €20m of revenue a year. “The specific pattern of his transactions was that they used fake transactions rolled on a permanent basis,” said Mr Mustier.
