OLDWICK, N.J.–(BUSINESS WIRE)–A.M. Best has removed from under review with negative implications and downgraded the Long-Term Issuer Credit Ratings to “aa-” from “aa” and affirmed the Financial Strength Rating of A+ (Superior) for the members of Andover Companies Pool (Andover), which consists of Merrimack Mutual Fire Insurance Company and its majority-owned subsidiary, Bay State Insurance Company, and its affiliate, Cambridge Mutual Fire Insurance Company. The outlook assigned to these Credi
