OLDWICK, N.J.–(BUSINESS WIRE)–A.M. Best has affirmed the Financial Strength Rating of A- (Excellent) and the Long-Term Issuer Credit Rating of “a-” of Massy United Insurance Ltd. (Massy United) (Barbados). The outlook of these Credit Ratings (ratings) remains stable. The rating affirmations reflect Massy United’s supportive balance sheet strength, positive earnings trend and strong regional market position in its core lines of business. In addition, Massy United has the full support of its ul