OREANDA-NEWS. A.M. Best has revised the outlooks to negative from stable and affirmed the financial strength rating of B (Fair) and the issuer credit rating of “bb” of American Underwriters Life Insurance Company (American Underwriters) (Phoenix, AZ) and its subsidiary, Century Life Assurance Company (Oklahoma City, OK). American Underwriters is the lead insurer within the American Underwriters Life Group (AUL) (Phoenix, AZ).