US tech giants’ shares jumped sharply on Wednesday after Democrats swept the midterm elections in both the House of Representatives and the Senate. The Nasdaq Composite jumped 1.44%, thanks to big gains in some top US technology stocks. Amazon shares rose 6.12% to a three-month high. Meta, Alphabet and Microsoft climbed between 2% and 6.68%. The gains helped lift the wider market after several days of selling. That selling was driven by worries over the high cost of the AI boom.