OLDWICK, N.J.–(BUSINESS WIRE)–A.M. Best has placed under review with positive implications the Financial Strength Rating of A- (Excellent) and the Long-Term Issuer Credit Ratings (Long-Term ICR) of “a-” of HM Casualty Insurance Company (HM Casualty) (headquartered in Pittsburgh, PA). The under review status follows the acquisition of HM Casualty by BrickStreet Mutual Insurance Company (BrickStreet) on Jan. 1, 2017. The ratings also reflect the quota share reinsurance agreement executed betwee