https://apnews.com/104e11251bae4b2ebd919e3758419713 > NEW YORK (AP) — Increased tensions ahead of U.S.-China trade negotiations knocked down stocks on Wall Street in early trading Tuesday and stretched the market's losses deeper into a fourth week. > The U.S. blacklisted a group of Chinese companies after claiming that their technology plays a role in the repression of China's Muslim minority groups. The latest move casts more doubt on whether the world's two largest economies will find a resolution to their long-running and economically damaging trade war. Envoys from the U.S. and China are preparing for another round of negotiations this week.