OLDWICK, N.J.–(BUSINESS WIRE)–A.M. Best has downgraded the Financial Strength Rating (FSR) to A+ (Superior) from A++ (Superior) and the Long-Term Issuer Credit Ratings (Long Term ICR) to “aa” from “aa+” of Amica Mutual Insurance Company (Amica Mutual) and its wholly owned subsidiary, Amica Property & Casualty Insurance Company (together known as Amica Mutual Group) (Amica). The outlook of the Long-Term ICR has been revised to negative from stable, while the outlook of the FSR remains stab
