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S&P 500, Nasdaq reach all-time closing highs on AI dealmaking boost

AMD shares surged over 30% after OpenAI's multibillion-dollar AI chip deal, boosting S&P 500 and Nasdaq's fourth weekly gain in five weeks, rising 1.1% and 1.3% respectively.

  • Last week, the S&P 500 and Nasdaq Composite completed their fourth weekly advance, rising 1.1% and 1.3% respectively as Wall Street hit record highs.
  • OpenAI committed to buying several generations of AI chips from Advanced Micro Devices and could take a stake, but the companies did not disclose the transaction cost in their joint announcement Monday.
  • Chipmaker stocks rallied on signs of booming AI demand as Advanced Micro Devices shares jumped over 30% shortly after the open, while Micron Technology rose about 3% to around $193.
  • Investors shrugged off shutdown worries as the Dow Jones Industrial Average rose, and Tom Lee, head of research at Fundstrat, wrote `Nevertheless, we think this is a 'sidebar' issue and probabilities heavily favor stocks remaining strong from October to December this year. In fact, we see S&P 500 reaching at least 7,000 by year-end and maybe higher`.
  • The shutdown delayed key economic data including the September jobs report, while Federal Reserve officials including Fed Governor Stephen Miran and Chair Jerome Powell are slated to speak this week.
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CNBC broke the news in United States on Sunday, October 5, 2025.
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