2008 Société Générale trading loss taken massive fraudulent directional positions in 2007 and 2008 far beyond his limited authority" and that the trades involved European stock index futures. Though bank officials say Kerviel apparently worked alone, skeptics question how unauthorized trading of this magnitude could go unnoticed. Kerviel's unassuming background and position have heightened the skepticism that he worked alone. Some analysts suggest that unauthorized trading of this scale may have gone unnoticed initially due to the high volume in low-risk trades normally conducted by his department. The bank said that whenever the fake trades were questioned, Kerviel would describe it as a mistake then
Proprietary trading come under closer scrutiny. One example of an alleged conflict of interest can be found in charges brought by the Australian Securities and Investment Commission against Citigroup in 2007. Famous proprietary traders have included Ivan Boesky, Steven A. Cohen, John Meriwether, Daniel Och, and Boaz Weinstein. Some of the investment banks most historically associated with trading were Salomon Brothers and Drexel Burnham Lambert. Trader Nick Leeson took down Barings Bank with unauthorized proprietary positions. Another trader, Brian Hunter, brought down the hedge fund Amaranth Advisors when his massive positions in natural gas futures went bad. Armin S, a German private