OREANDA-NEWS. A.M. Best has upgraded the financial strength rating to A (Excellent) from A- (Excellent) and the issuer credit ratings (ICR) to “a” from “a-” of JRG Reinsurance Company, Ltd. (JRG Re) and its U.S.-based insurance affiliates. Concurrently, A.M. Best has upgraded the ICR to “bbb” from “bbb-” of James River Group Holdings, Ltd. (Holdings) [NASDAQ: JRVR]. The outlook for each of the ratings has been revised to stable from positive. Holdings and JRG Re are domiciled in Pembroke, Bermuda, while the U.S. companies are based in Richmond, VA and Raleigh, NC.