The United States is considering new restrictions on the export of artificial intelligence chips to China. Shares of Nvidia (NVDA.O) fell more than 2% and Advanced Micro Devices (AMD) (AMD.O) fell about 1.5% on the news in extended trading. The report says the Commerce Department will stop deliveries of chips made by Nvidia and other chipmakers to customers in China as early as July.  Nvidia, Micron and AMD are among the US chip makers caught in the crossfire between China and the Biden administration. Nvidia said in...