Key TakeawaysNvidia, ASML, and other chip stocks tumbled Wednesday following reports of potential government moves that could negatively impact the sector.The Biden Administration is reportedly considering tightening restrictions on exports of semiconductor equipment to China.Separately, former President Donald Trump said in an interview with Bloomberg Businessweek that Taiwan should pay the U.S. for defense, raising concerns about how geopolitical tensions could affect the chip industry. Nvidia (NVDA), Qua ...