Among individual movers, SoundHound SOUN rallied 30% after the voice AI platform provider posted a more than 200% leap in second-quarter revenue, to a record $42.7 million. It also raised its full-year midpoint sales outlook to $169 million, up from $167 million. Its loss of 3 cents per share narrowed from the year-earlier quarter.

Tech shares were aided by reports of a $100 billion U.S. manufacturing pledge from the iPhone maker. The Nasdaq rose 1.2%, while the S&P 500 gained 0.7% and the Dow industrials added 0.2%.