Apple Inc AAPL.O edged up 0.2% ahead of the release of its new range of iPhone models and Apple Watches. By Sruthi Shankar and Ankika Biswas Sept 7 (Reuters) - U.S. stock indexes climbed on Wednesday following a recent selloff as bond yields eased, while investor focus was squarely on the Federal Reserve's monetary policy tightening plans. U.S. stocks have sold off sharply since mid-August after hawkish comments from Fed Chair Jerome Powell were compounded by signs of an economic slowdown in Europe and China and aggressive steps by major central banks to tame inflation.