FTSE 100 Tumbles 2 Percent Amid Global AI Selloff

The FTSE 100 tumbled 2.2 percent on Friday toward its steepest fall in over seven months. Democratic control of the US Congress sparked investor fears over potential AI regulation and reduced data-centre spending.

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Financial markets data and information are displayed above an LSEG (London Stock Exchange Group) branded cube inside the LSEG headquarters in Paternoster Square, London, Britain, September 8, 2026. REUTERS/Toby Melville

The United Kingdom's FTSE 100 fell 2.2% to 10,540.78 points during Friday midday trading, heading for its steepest drop in over seven months. The rout followed a sharp global equities selloff sparked by artificial intelligence jitters tied to political shifts in the United States' Congress. Investors trimmed exposure after Democratic legislative victories raised expectations of tighter AI regulations and a slowdown in data-center buildouts.