Frenkel to take dual role at Merrill

He will be based in London and his efforts will focus on Europe, the Middle East and Latin America. Patrick Duverger is retiring as co-chief executive of Société Générale in April. There are no plans to find a successor. Philippe Citerne, 50, will remain chief executive and continue to report to chairman Daniel Bouton, 49. Juergen Krumnow, Deutsche Bank's former chief financial officer, is set to join Arthur Andersen as an adviser in February. He will work three to four days a week for the consultancy, leaving time to serve as a supervisory board member at Volkswagen, among others. The International Swaps and Derivatives Association has announced that Ruth Ainslie has accepted the new position of senior director for policy in the Americas and media relations. Ainslie joins Isda from Bankers Trust where she was managing director.