Exxon Mobil has been rate AAA by S&P since 1930 according to Bloomberg. Today that ended as the global crude explorer with sales that dwarf the economies of most nations was cut to AA+ (Outlook stable). Having been put on notice in February (negative watch), citing concern that credit measures would remain weak through 2018.
Credit measures will be weak for a AAA rating due, in part, to low commodity prices, high reinvestment requirements and large dividend payments, S&P says.