OLDWICK, N.J.–(BUSINESS WIRE)–A.M. Best has assigned a Financial Strength Rating of A- (Excellent) and a Long-Term Issuer Credit Rating (Long-Term ICR) of “a-” to New Mexico Business Insurance Company (NMBIC) and New Mexico Commercial Insurance Company (NMCIC), newly formed members of New Mexico Mutual Group (New Mexico Mutual Group). The outlook assigned to these Credit Ratings (ratings) is stable. All companies are headquartered in Albuquerque, NM. NMBIC and NMCIC are wholly owned subsidiar