OREANDA-NEWS. A.M. Best has affirmed the financial strength rating (FSR) of A+ (Superior) and the issuer credit ratings (ICR) of “aa-” of Renaissance Reinsurance Ltd. (RenRe) and Renaissance Reinsurance of Europe (Dublin, Ireland). A.M. Best also affirmed the ICR of “a-” and all issue ratings of RenaissanceRe Holdings Ltd. (RenaissanceRe) [NYSE:RNR]. The outlook for each of these ratings remains negative.