Premarket: Shares skid as Nvidia hurt by U.S. chip-sale curbs, gold hits record

Asian and European shares fell on Wednesday along with U.S. stock futures as AI darling Nvidia took a hit from U.S. restrictions on chip sales to China amid the intensifying global trade war, while gold climbed to a record and the dollar slid. Treasury yields dipped slightly ahead of a speech from Federal Reserve Chair Jerome Powell later in the day. Traders are wondering if he will echo the dovish tone set by his colleague Fed Governor Christopher Waller. Overnight, Washington issued new export licensing requirements for Nvidia's H20 and AMD's MI308 artificial intelligence chips to China. Nvidia's shares slumped…