OLDWICK, N.J.–(BUSINESS WIRE)–A.M. Best has commented that the Credit Ratings (ratings) of Unum Group (Unum) (headquartered in Chattanooga, TN) [NYSE: UNM] and its insurance subsidiaries remain unchanged following the announcement that the company will be accelerating its annual long-term care (LTC) insurance reserve analysis, which is normally completed in the fourth quarter. Subject to its completion, Unum may need to strengthen its LTC reserves in the third quarter. Although the company is