 OLDWICK, N.J.--BUSINESS WIRE--AM Best has placed under review with developing implications the Long-Term Issuer Credit Rating Long-Term ICR of bbb- and the Long-Term Issue Credit Rating Long-Term IR of Hallmark Financial Services, Inc. Hallmark Financial NASDAQ:HALL. Concurrently, AM Best has placed under review with developing implications the Financial Strength Rating FSR of A- Excellent and the Long-Term ICRs of a- of the members of Hallmark Insurance Group Hallmark Group 