S&P 500 and Nasdaq fall as investors worry about massive AI spending by tech giants
The S&P 500 and Nasdaq fell today as massive AI spending by Microsoft and other firms sparked fears about returns. Markets also weighed geopolitical tensions.
洞察:
U.S. equity indexes fell on January 29, 2026, as major technology earnings and investor concerns over heavy artificial-intelligence spending by mega-cap firms weighed on the market. The S&P 500 and the Nasdaq Composite both closed lower during the session, with the technology sector emerging as the primary laggard among the 11 major sectors of the S&P 500. These moves materially affected benchmark indices and individual mega-cap share prices, altering market positioning and trading volumes throughout the United States 
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