NEW YORK--(BUSINESS WIRE)--New York Life, America’s largest mutual life insurer, today announced that over the summer, all four major rating agencies have affirmed the company’s highest possible ratings for financial strength, with a stable outlook. Fitch Ratings affirmed the company’s financial strength rating of AAA, its highest possible rating, on August 11, 2015. Earlier this month, on August 6, Moody’s affirmed its highest financial strength rating, Aaa, on New York Life. Also, this past J