Stock market news today: S&P 500, Nasdaq futures tumble as China curb risk rattles techs Yahoo FinanceUS Floats Idea of Tougher Trade Rules in Chip Crackdown on China BloombergDow Jones Futures Fall As Nvidia, Tesla, TSMC Tumble; ASML Dives On Earnings Investor’s Business DailyGlobal chip stocks from Nvidia to ASML fall on geopolitics, Trump comments CNBCNvidia, TSMC, Five Below, Spirit Airlines and Eli Lilly fall premarket Investing.com