新浪财经隔夜要闻大事汇总：2026年1月31日

Market - On January 31, U.S. stocks closed lower, but all three major indices recorded gains for January. The Dow Jones, Nasdaq, and S&P 500 all fell, with the Dow and Nasdaq down for the week, while the S&P 500 rose. In January, all three indices saw increases. Trump's nomination of Kevin Warsh to replace Powell as Federal Reserve Chairman is viewed as a relatively hawkish choice, leading to a sharp drop in gold and silver prices. Analysts suggest the sell-off may be due to profit-taking and multiple factors overlapping. Market uncertainty surrounds Warsh's future policy direction, as his appointment requires Senate confirmation, which may spark controversy. Additionally, the market is assessing tech earnings, with U.S. wholesale inflation in December exceeding expectations [1][2]. - Among the top 20 stocks by trading volume on January 31, SanDisk saw a cumulative increase of over 140% in January, driven by chip demand. Tesla rose 3.32%, with capital expenditures expected to more than double by 2026. Nvidia fell 0.72%, but was up 1.84% for the week, linked to its collaboration with Mercedes-Benz on autonomous taxi services. Microsoft continued its downward trend, down 7.65% for the week despite exceeding expectations in its Q2 earnings, attributed to slowing Azure growth. SanDisk rose 6.85%, with a 142.75% increase in January due to the AI boom driving chip demand. Other stocks like Micron and AMD experienced varying degrees of gains and losses, while Applovin suffered due to a new Google project [2]. Company - Apple’s artificial intelligence team is experiencing a wave of departures, with several researchers leaving for Meta and Google. This includes the loss of a Siri executive and at least four other researchers in recent weeks. The departures highlight ongoing turmoil within Apple's AI department, raising concerns about its competitiveness and employee dissatisfaction regarding outsourced technology [1]. - Google has launched an AI model called "Project Genie," which can create interactive digital worlds from simple prompts. This innovation has led to significant declines in the stock prices of video game companies such as Take-Two Interactive, Roblox, and Unity Software. The model's ability to simulate real-world environments may disrupt traditional game development, although there are concerns about potential job losses in the industry [2]. - American Express reported a 13% increase in fourth-quarter profits, reaching $2.46 billion, primarily driven by high-net-worth customers significantly increasing their spending on luxury goods, dining, and travel. The company’s performance aligns with analyst expectations, and it plans to raise its quarterly dividend while providing guidance for 2026 [3]. - Tesla's stock rose 4.1% as the company shifts focus towards robotics, with capital expenditures expected to more than double to approximately $20 billion by 2026. This investment will primarily support the development of autonomous driving technology and humanoid robots, indicating a strategic pivot in Tesla's business operations [7].