Also on Tuesday, Fitch Ratings downgraded Wells Fargo's credit rating by one notch to "A+" from "AA-", saying that the company's earnings profile will be "diminished" from historical levels and that improvements in risk governance and controls will take longer than anticipated. REGULATORY, LEGAL TANGLES The stakes are high for Sloan as he tries to shake the scandal. The Office of the Comptroller of the Currency, the leading regulator for Wells Fargo, is considering new sanctions against the bank for customer abuses involving auto insurance and mortgage loans, Reuters reported on Monday. Wells Fargo a year ago reached a $190 million settlement with regulators after it said employees had potentially opened as many as 2.1 million unauthorised accounts to meet internal sales targets. The bank raised that estimate in August to potentially as many as 3.5 million. Sloan said on Tuesday he was "confident" no more than 3.5 million unauthorised accounts were opened.