Societe General's Jerome Kerviel worked at a Delta trading desk in the investment banking operation. Kweku Adaboli, 31, a UBS trader, worked at a Delta One trading desk specialized in exchange-traded funds and other securities positions. He is charged with two counts of false accounting and one count of fraud. Delta is a term in the banking industry for how a bank can customize a security for a client, and following this closely replicate another transaction that acts to mitigate the risk. The first transaction is a "derivative" trade, which is basically a bet on the direction of a group of stocks or other securities. Jerome Kerviel was accused of trying to hide $7.2 billion in losses and was sentenced to three years in prison. The Delta One trading desks can generate $1 billion in annual revenue for banks and are used by Societe Generale, BNP Paribas, Goldman Sachs and Morgan Stanley U.S. At the same time risk is increasing with unpredictability and higher volatility in the financial markets in 2011. Another feature of the trader problems at UBS and Societe Generale is the relative youth and lack of experience of the traders, and that risk management systems allow traders with insignificant experience to make such large transactions. Other questions about how much risk a bank should be allowed to take, and about ring fencing the investment banking units of each bank, are relevant. Swiss banking regulators were working to ringfence the investment banking units of UBS and other Swiss banks after earlier problems at Swiss banks in the global financial crisis of 2008. Under the proposed regulation by Swiss regulators UBS investment banking unit would be headquartered in another country and hold its own capital, and be subject to local regulators. ...