Nvidia faces a reckoning as Chinese upstart raises questions about Wall Street's darling

NEW YORK (AP) — The superstar run for Nvidia’s stock the last few years has been astonishing. So was its tumble Monday, which caused $595 billion in wealth to vanish. That’s about as much as PepsiCo, McDonalds, Starbucks and Target are worth, combined. Mostly known only in gaming and crypto circles a few years ago, Nvidia burst into the zeitgeist a...