Big Tech's AI push is widening the stock market rally

Goldman Sachs says the rally is broadening as Big Tech’s free cash flow comes under pressure from AI-related capex, fueling a rotation into a wider set of stocks and helping the equally weighted S&P outperform the cap-weighted index. With Meta and Alphabet guiding higher capex and a resilient economy boosting M&A, broad participation could persist even as cash flow remains subdued in tech.