The Sultanate of Oman has started marketing a seven-year US dollar benchmark-sized sukuk offering at 270bp area over mid-swaps. Books are open for pricing via Alizz Islamic Bank, Citigroup, Dubai Islamic Bank, Gulf International Bank, HSBC, JP Morgan and Standard Chartered. The sovereign had signalled the possibility of an additional 12-year sukuk in its mandate. Expected issue ratings are Baa1 by Moody's and BBB by Fitch.