OLDWICK, N.J.–(BUSINESS WIRE)–A.M. Best has revised the outlook to positive from stable for the Long-Term Issuer Credit Rating (Long-Term ICR) and affirmed the Financial Strength Rating (FSR) of A (Excellent) and the Long-Term ICR of “a” of Energy Insurance Mutual Limited (EIM) (Bridgetown, Barbados). The outlook of the FSR remains stable. The Credit Ratings (ratings) reflect EIM’s balance sheet strength, which A.M. Best categorizes as strongest, as well as its adequate operating performance,