Stock Market Today: Nasdaq Futures Fall After Nvidia Records $5.5 Billion Charge WSJStocks Tumble as Tech Investors Pull Back The New York TimesGlobal chip stocks slide as Nvidia warns of big hit from U.S. export curbs Yahoo FinanceNvidia takes $5.5 billion hit as US clamps down on its China chips CNNAnalysts revisit Nvidia stock price targets as US restricts China chip sales TheStreet