OREANDA-NEWS. A.M. Best has downgraded the financial strength rating (FSR) to B++ (Good) from A- (Excellent) and the issuer credit ratings (ICR) to “bbb+” from “a-” of National Fire and Indemnity Exchange (NFIE) (St. Louis, MO). The outlook for the FSR has been revised to stable from negative, while the outlook for the ICR is negative