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S&P 500, Nasdaq end sharply lower as revived AI doubts ignite tech selloff

High-profile earnings fueled fresh doubts about costly AI investments, sending the Philadelphia semiconductor index down about one-fourth from its June peak, traders said.

  • On Thursday, the Nasdaq Composite fell 2.58% to 26,008.86 as high-profile earnings reports reignited fears about the AI spending race, marking its steepest daily drop since June.
  • The Philadelphia Semiconductor Index has plunged, losing about one-fourth of its value since June 22, 2026, as investors reassess AI-exposed hardware amid broader tech sector concerns.
  • Paul Nolte, senior wealth adviser at Murphy & Sylvest, noted "Investors are starting to realize that there are some holes in the AI story," explaining the tech-heavy indices' decline.
  • Meta Platforms reported its first cash outflow in over a decade due to AI-related spending, while chipmakers Western Digital, Intel, and Marvell posted steep percentage losses amid the semiconductor selloff.
  • Despite the tech selloff, the Dow Jones Industrial Average rose 0.03% and 83% of S&P 500 companies beat analyst expectations, indicating broader market fundamentals remain intact.
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On the 22nd (local time), major New York stock indices were significantly shaken by a combination of selling pressure on technology stocks and geopolitical tensions emanating from the Middle East. While Big Tech companies are pouring astronomical sums into securing leadership in artificial intelligence (AI), investor concerns have grown regarding whether they can reap commensurate returns in a timely manner. Furthermore, armed conflicts are expe…

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(New York = Yonhap News) Correspondent Lim Soo-jung = The New York stock market plummeted on the 22nd (local time), centered on technology stocks, as skepticism about investment in artificial intelligence (AI) resurfaced...

·Seoul, Korea (the Republic of)
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CNBC broke the news in Englewood Cliffs, United States on Wednesday, October 21, 2026.
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