Nasdaq suffers worst day in 18 months as election result fuels AI slowdown fears
The Nasdaq composite fell 5.5%, its worst one-day decline in 18 months, as concerns that the US midterm election results could bring tougher regulation of artificial intelligence and data centres erased more than $2tn from the index’s value.The Nasdaq composite dropped 5.5% on Thursday, its worst one-day performance in 18 months. Investors increasingly expect the US midterm election results to lead to tougher scrutiny of artificial intelligence and data-centre construction. The index moved into correction territory, more than 10% below its recent record high, while more than $2tn was erased from its value by the close. It was the index’s biggest daily fall since Donald Trump announced tariffs on US trading partners in April 2025.
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