At the opening of the U.S. stock market, the Dow fell 0.13%, the S&P 500 fell 0.83%, and the Nasdaq fell 1.35%. AI chip stocks fell across the board, with Nvidia falling more than 4%, TSMC falling nearly 4%, Broadcom falling more than 2%, and Qualcomm falling 1.4%. The Biden administration of the United States issued new regulations on Monday, imposing AI chip export quotas and restrictions on more than 100 countries and regions around the world.