Qatar Islamic Bank will hold investor meetings in Asia, the Middle East and Europe starting on Friday for a possible benchmark offer of U.S. dollar-denominated Regulation S senior sukuk, leads said on Wednesday. The bank mandated Barwa Bank, Citi, HSBC, Noor Bank, QInvest and Standard Chartered as joint lead managers for the possible issue, which would be off Qatar Islamic's existing $1.5 billion Trust Certificate Issuance Programme. Benchmark usually means at least $500 million.