Lawsuit accuses 22 banks of manipulating U.S. Treasury auctionsThe State-Boston Retirement System, the pension fund for Boston public employees, accused Bank of America Corp’s (BAC.N) Merrill Lynch unit, Citigroup Inc (C.N), Credit Suisse Group AG CGSN.VX, Deutsche Bank (DBKGn.DE), Goldman Sachs Group Inc (GS.N), HSBC Holdings Plc (HSBA.L), JPMorgan Chase & Co (JPM.N), UBS Group AG UBSN.S and 14 other defendants of illegally trying to profit on the sale of Treasury bills, notes and bonds at investors’ expense.