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 Texas Mutual Insurance Company (Texas Mutual). The outlook of the FSR remains stable. The ratings reflect Texas Mutual’s balance sheet strength, which A.M. Best categorizes as strongest, as well as its strong operating performance, limited business profile