AM Best has affirmed the financial strength and credit ratings of RenaissanceRe and its subsidiaries, maintaining positive and stable outlooks across the group. The ratings agency said, “AM Best has affirmed the Long-Term Issuer Credit Rating [Long-Term ICR] of “a-” [Excellent] and the Long-Term Issue Credit Ratings [Long-Term IRs] of RenaissanceRe Holdings Ltd [RenaissanceRe] [NYSE: …