Wall Street suffered its worst single-day sell-off in years, wiping more than $3 trillion off the market as midterm election results settled. width=device-width, initial-scale=1, shrink-to-fit=no" name="viewport"/>Wall Street sheds $3 trillion in massive post-midterm plunge. S&P 500 firms shed $2.9 trillion in market value and Nasdaq companies lost $2.5 trillion – both single-day records. Chip and AI stocks led a delayed selloff on fears new Democratic governors will pause data centers.