Standard & Poor’s (S&P) has withdrawn its credit rating on DP World after the ports operator objected to the way the agency assessed its financial health. S&P said it pulled the ratings at DP World’s request. The Company, part of Dubai World, is rated investment grade by Moody’s and Fitch. The world’s third biggest ports operator was rated ‘BB/B’ with a stable outlook by S&P, revised down from positive in February.