Stock market today: Most of Wall Street rises, but Nvidia tumbles again as AI mania cools

NEW YORK— Another slide for Wall Street heavyweight Nvidia kept U.S. indexes mixed Monday, even as the majority of stocks rallied. JPMorgan Chase added 1.3%, and Wells Fargo climbed 1.6% ahead of results coming later in the week for tests by the Federal Reserve of how big banks would fare in a recession. Nearly insatiable demand for Nvidia' s chips to power…