U.S. stock indexes fell, led by tech and semiconductor stocks, amid AI chip export concerns and ASML's sales forecast.

On Tuesday, major U.S. stock indexes fell, driven by a significant drop in the tech sector, particularly semiconductor stocks like Nvidia, which declined over 5% amid fears of potential U.S. export restrictions on AI chips. This was exacerbated by a disappointing sales forecast from ASML, leading its shares to plummet 16%. Energy stocks also dropped due to falling crude prices. In contrast, regional banks and certain consumer sectors saw gains.