Federal prosecutors plan to file criminal actions against four former traders who allegedly overvalued collateralized debt obligations (CDOs) sold by Credit Suisse in order to increase their commissions. The events occurred in 2008 and resulted in a $2.85 billion write down by Credit Suisse. Credit Suisse fired the traders and cooperated with authorities in their investigation. (“Ex-Traders at Credit Suisse Expected to Be Charged With Fraud,” New York Times, Dealbook).