(Updates to mid-afternoon trading) * Indexes: Dow about flat, S&P up 0.57%, Nasdaq gains 1.14% * Boeing drops following quarterly loss * Data shows AI capex continues apace By Stephen Culp and Shashwat Chauhan NEW YORK, Oct 27 (Reuters) - An AI-fueled tech rally sent US stocks higher on Tuesday as third-quarter reporting season gained steam, while easing oil prices soothed inflation jitters and the Federal Reserve convened for its penultimate meeting of the year.