By Chris Prentice and Dhara Ranasinghe WASHINGTON/LONDON (Reuters) -World stocks rallied on Wednesday, with Wall Street rising again on a Big Tech boost and European shares gaining on strong earnings as investors put aside worries about rising interest rates for now. The benchmark 10-year U.S. Treasury yield slipped from multi-year highs hit in the previous session, helping steady sentiment across global markets and boosting demand for growth stocks. The S&P 500 and the Nasdaq Composite jumped more than 1% as tech stocks extended their rally. The Dow Jones Industrial Average rose 0.86% to end …