US stocks post best day since August as Democrats sweep midterms

· Finance · United States

US stocks recorded their best session since August after Democrats swept the midterm elections, with investors positioning for policy winners and losers. Hyperscalers rallied while chipmakers fell on expectations of a backlash against the AI buildout; Microsoft and Amazon together added $424 billion in market value, helped by a cloud-supply crunch that could let them raise prices. Qualcomm and Micron slid, and power providers tied to data centers dropped while chemical maker Mosaic led S&P 500 gainers. The S&P 500 has fallen into deeply oversold territory even as nearly half its constituents remain overbought, an unusual divergence concentrated in Big Tech. Treasury yields were little changed as traders weighed the results. Oil tumbled as Vice President JD Vance blamed the Iran war for the Republican defeat, and the reshaped Congress is expected to push back on tariffs and the Middle East conflict.

Why it matters：The election outcome changes the expected regulatory and spending backdrop for AI infrastructure, energy and trade, forcing investors to reprice sector winners and losers.

Key points

  • Microsoft and Amazon together added $424 billion in market cap on Wednesday
  • Qualcomm fell on losing Apple business and high memory costs; Micron slipped
  • Treasury yields were little changed as traders digested the results

Sources (original reporting)

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