OLDWICK, N.J.--(BUSINESS WIRE)-- #insurance--AM Best has affirmed the Financial Strength Rating (FSR) of A+ (Superior) and the Long-Term Issuer Credit Ratings (Long-Term ICR) of “aa-” (Superior) of Renaissance Reinsurance Ltd. (RenaissanceRe), Renaissance Reinsurance U.S. Inc. (Maryland), RenaissanceRe Specialty U.S. Ltd., Renaissance Reinsurance of Europe Unlimited Company (Dublin, Ireland) and RenaissanceRe Europe AG (Zurich, Switzerland). Additionally, AM Best has affirmed the Long-Term ICR of “a-” (Exce