AM Best Places Credit Ratings of State Automobile Mutual Insurance Company and Its Operating Subsidiaries Under Review with Positive Implications OLDWICK, N.J.--(BUSINESS WIRE)-- #insurance--AM 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- (Excellent) of State Automobile Mutual Insurance Company (SAM) and its operating subsidiaries. Concurrently, AM Best has placed under review with positive implications the Long-Term ICR of bbb- (Good) of SAMs intermediate holding company, State Auto Financial Corporation (STFC) [NASDAQ: STFC]