Moody's did not elaborate on why it had taken the decision in the statement, but policy documents on its website say business reasons, often refers to Moody's "business reasons, not the business reasons of the Rated Entity or obligor".

"MIS's (Moody's) business reasons generally do not reflect any concerns about the Rated Entity's creditworthiness or the quality of its management," the policy reads.

(Reporting by Mfuneko Toyana, editing by Louise Heavens)