How major US stock indexes fared Tuesday 5/12/2026

The Dow Jones Industrial Average added 0.1%, and the Nasdaq composite sank 0.7% from its own record. Stocks that had roared higher in the artificial-intelligence boom were some of the market's heaviest weights. The pullback began in Asia, where South Korea's Kospi index tumbled 2.3% on worries that the government may redistribute windfall AI profits to its citizens.