ollectively violated U.S. commodities and antitrust laws and state common law by manipulating Libor and prices of Libor-based derivatives in various markets, RBS said in a note on its Aug. 26 financial statement.In April, a European asset-management firm and two related funds accused 12 banks, including Bank of America, Barclays, Citigroup, Credit Suisse, HSBC and JPMorgan Chase, of conspiring to