Shares of AppleAAPL.O, the largest U.S. company by market value, were up 3%. By Lewis Krauskopf, Shreyashi Sanyal and Johann M Cherian Feb 3 (Reuters) - Major U.S. stock indexes fell in choppy trading on Friday after surprisingly strong jobs data sparked concerns about aggressive Federal Reserve action, while investors digested a mixed bag of megacap company earnings reports. Investors have been balancing hopeful signs that the economy could avoid a feared recession against concerns about how long the Fed will keep interest rates high to rein in inflation.