OLDWICK, N.J.--(BUSINESS WIRE)-- #insurance--AM Best has revised the outlooks to positive from stable for the Long-Term Issuer Credit Ratings (Long-Term ICRs) and affirmed the Financial Strength Rating (FSR) of A+ (Superior) and the Long-Term ICRs of "aa-†(Superior) of Renaissance Reinsurance Ltd. (RenaissanceRe), Renaissance Reinsurance U.S. Inc. (New York, NY), RenaissanceRe Specialty U.S. Ltd., Renaissance Reinsurance of Europe Designated Activity Company (Dublin, Ireland) and RenaissanceRe Europe AG (Z. ...