OLDWICK, N.J.–(BUSINESS WIRE)–A.M. Best has revised the outlooks to stable from positive and affirmed the Financial Strength Rating of A- (Excellent) and the Long-Term Issuer Credit Rating of “a-” of Center Mutual Insurance Company (Rugby, ND) The ratings reflect Center Mutual’s balance sheet strength, which A.M. Best categorizes as very strong, as well as its adequate operating performance, limited business profile and appropriate enterprise risk management. While Center Mutual posted positi
