Press Release: Medicalmutual : AM Best Upgrades Issuer Credit Rating of Medical Mutual Insurance Company of Maine

OLDWICK, N.J.--(BUSINESS WIRE)-- #insurance--AM Best has upgraded the Long-Term Issuer Credit Rating to "a+" (Excellent) from "a" (Excellent) and affirmed the Financial Strength Rating of A (Excellent) of Medical Mutual Insurance Company of Maine (MMIC) (Portland, ME). The outlook of these Credit Ratings (ratings) is stable. The ratings reflect MMIC's balance sheet strength, which AM Best assesses as strongest, as well as its strong operating performance, limited business profile and appropriate enterprise