新浪财经隔夜要闻大事汇总：2026年2月7日

Market - The Dow Jones Industrial Average closed above 50,000 for the first time, gaining over 1,200 points, marking a historic intraday high [1] - Major tech stocks rebounded, with Nvidia and Broadcom leading the gains, while Amazon's stock fell due to disappointing earnings guidance [1][2] - Bitcoin recovered some losses, rising 13% to over $71,000 after a significant drop earlier in the week [4][5] Company - Nvidia's CEO Jensen Huang stated that the $660 billion capital expenditure for AI infrastructure is sustainable, leading to a 7.78% increase in Nvidia's stock [2][16][17] - Tesla is accelerating hiring to support Elon Musk's plan to become the largest solar panel manufacturer in the U.S., aiming for 100 GW of solar manufacturing capacity by the end of 2028 [15] - Amazon plans to increase its capital expenditure on AI to over $200 billion, which led to a significant drop in its stock price following its earnings report [22] - Netflix is under investigation by the U.S. Department of Justice for potential anti-competitive behavior related to its acquisition of Warner Bros. [18] - Apple is preparing to allow third-party voice AI assistants in its CarPlay system, marking a strategic shift from only allowing its own Siri [19]