The S&P 500 went up 14.77 points or 0.2% to close at 6047.15, a record closing high. It is the index's 54th record close of 2024. The Nasdaq Composite gained 185.78 points or 1% to finish at 19403.95, a record close. It is the index's 33rd record close of 2024.

U.S. stock indexes rose to more records Wednesday after tech companies talked up how much of a boost they’re getting from the artificial-intelligence boom. The S&P 500 climbed 0.6% to add to what’s set to be one of its best years of the millennium.