AM Best has affirmed the financial strength and credit ratings of Bermuda-based Top Layer Reinsurance Ltd., maintaining stable outlooks. The ratings agency said, “AM Best has affirmed the Financial Strength Rating [FSR] of A+ [Superior] and the Long-Term Issuer Credit Rating [Long-Term ICR] of “aa-” [Superior] of Top Layer Reinsurance Ltd. [Top Layer] [Bermuda]. The …