 OLDWICK, N.J.--BUSINESS WIRE--AM Best has revised the outlook to negative from stable for the Long-Term Issuer Credit Rating Long-Term ICR and affirmed the Financial Strength Rating FSR of B Fair and the Long-Term ICR of bb Fair of Genworth Life and Annuity Insurance Company GLAIC Richmond, VA. The outlook of the FSR is stable. Concurrently, AM Best has affirmed the FSR of C Marginal and the Long-Term ICRs of b Marginal of Genworth Life Insurance Company GLIC Wilming 