A.M. Best has revised the outlook of the issuer credit ratings (ICR) to positive from stable and affirmed the financial strength rating (FSR) of A++ (Superior) and the ICRs of “aa+”of the property/casualty subsidiaries of The Chubb Corporation (Chubb Corp) [NYSE: CB], also known as the Chubb Group of Insurance Companies (Chubb Group). The outlook for the FSR is stable. Concurrently, A.M. Best has affirmed the ICR of “aa-”, all long-term debt and indicative ratings and the AMB-1+ on the commercial paper of Chubb Corp. The outlook for the ICR and all debt ratings has been revised to positive from stable, with the exception of the commercial paper, which does not have an outlook. A.M. Best also has affirmed the FSR of A++ (Superior) and ICR of “aa+” of Chubb Atlantic Indemnity Ltd. (Chubb Atlantic) (Pembroke, Bermuda). The outlook for both ratings is stable. In addition, A.M. Best has withdrawn the FSR of A++ (Superior) and ICR of “aa+” of Northwestern Pacific Indemnity Company (Northwestern Pacific) (Portland OR), following its February 12, 2014 sale to Cottage Insurance Holdings (Cottage). All companies are headquartered in Warren, NJ, except where specified. (See below for a detailed listing of the companies and ratings.) The rating affirmations reflect the Chubb Group’s superior risk-adjusted capitalization, excellent underwriting and overall operating performance, and the sustainable competitive advantages within its specialty and upscale personal insurance businesses, as demonstrated by its consistent outperformance of industry peers. The ratings also recognize Chubb Group’s comprehensive and proactive enterprise risk management, disciplined underwriting practices, strong franchise recognition and access to the capital markets through Chubb Corp. The group’s positive rating attributes are enhanced by its position as a leading insurer in the United States and its global presence in specialty markets. The strength of Chubb Group’s balance sheet is derived from its consistent generation of underwriting results, despite the recent impact of catastrophes and competitive market conditions. Additionally, the group benefits from a well-diversified book of business, which has led to excellent risk-adjusted capitalization. Chubb Group’s results also benefit from an above average total return on invested assets and strong underwriting and operating cash flows.