Oman has raised $2.2 billion with a loan, sources said, in a deal which attracted interest from a vast group of regional and international lenders. The Gulf state, rated sub-investment grade by all major credit rating agencies, was working with a group of banks to raise a $1.1 billion loan, which could have gone up to $2 billion depending on market appetite, sources told Reuters in January. The deal was eventually completed at $2.2 billion last week, the sources said.