OLDWICK, N.J.–(BUSINESS WIRE)–A.M. Best has placed under review with developing implications the Financial Strength Rating of A (Excellent) and the Long-Term Issuer Credit Rating of “a” of Liberty Life Assurance Company of Boston (Liberty Life) (Dover, NH). The Credit Rating (rating) actions follow the announcement on Jan. 19, 2018, that Liberty Life’s ultimate parent, Liberty Mutual Holding Company, Inc. (Liberty Mutual), has entered into a definitive agreement to sell Liberty Life to Lincol