The International Finance Facility for Immunisation Co. (IFFI), for which the World Bank acts as treasury manager, has picked four banks for a potential U.S. dollar-denominated sukuk. Rated AA by Standard and Poor's and AA+ by Fitch, IFFI has mandated Qatar's Barwa Bank, National Bank of Abu Dhabi, and Standard Chartered to arrange investor meetings in the Middle East, Europe and Asia. A potential sukuk offer may follow the roadshows - for which a schedule has not been given - subject to market conditions before the end of the year.