NEW YORK (AP) — Computer chipmakers and other winners of the artificial-intelligence boom are slumping again Thursday and weighing on stock markets worldwide. They’re drowning out strength for most of the rest of Wall Street, leaving U.S. stock indexes close to flat.

The S&P 500 was virtually unchanged, a day after it pulled within 0.5% of its all-time high set last month. The Dow Jones Industrial Average was up 81 points, or 0.2% as of 10:30 a.m. Eastern time, and the Nasdaq composite was 0.5% lower.