U.S. stock index futures slipped on Tuesday as higher crude oil prices, elevated Treasury yields and an uncertain outlook for AI demand kept investors at bay. Several tech stocks sank premarket, with Alphabet and Microsoft down more than 1% each. Chipmakers, which bore the brunt of Monday’s selloff, were trading within a narrow range. Nvidia rose marginally. The latest bout of anxiety was driven by calls from top AI companies to slow the development of the technology, citing safety…
