Acciona is among renewable energy utilities which ''should be benefiting from many years of growth,'' London-based Matila Gergolet wrote in a note to investors today. ''Currently the shares are discounting only few years of growth.'' Bank Shares The Stoxx 600 earlier slumped 1% in mid-day trading on deepening concern about credit-market losses at banks. UniCredit, Italy's biggest bank, dropped 2.1% to 4.64 euros. HVB, UniCredit's German banking unit, said it expects ``significant'' losses related to the credit crisis in the first quarter.