Chip export restrictions to China have been an overhang on Nvidia (NVDA 3.56%) shares. But after dipping below the 100level,BankofAmericaanalystVivekAryabelievestheleadingartificialintelligence(AI)chipmakerisworthbuying.Earlierthisweek,theanalystloweredthefirm′spricetargetonthesharesfrom160 to 150,implying44104 share price, while maintaining a "buy" rating.Why buy Nvidia stockNvidia disclosed on April 15 it would take a $5.5 billion financial hit ...