Chicago Trading Firm's Lawsuit Claims Banks Conspired to Manipulate Libor

``A Chicago trading firm accused Bank of America Corp. (BAC), JPMorgan Chase & Co. (JPM), UBS AG (UBSN) and Citigroup Inc. (C) of conspiring to manipulate the London interbank offered rate. The banks drove down Libor to generate billions of dollars in profits from swaps, loans, interest rate derivatives and other financial instruments whose value depended on the rate, Eldorado Trading Group LLC said in a complaint filed July 5 in federal court in Newark, New Jersey. ''