美股三大指数回暖收涨，美光科技再创历史新高，中概股迎反弹

Market Overview - The U.S. stock market saw slight gains on Wednesday, with the S&P 500 index rising by 0.37% to 6796.29 points, the Nasdaq Composite increasing by 0.65% to 23499.8 points, and the Dow Jones Industrial Average up by 0.48% to 47311 points, amid sharp questioning of Trump's tariffs by the U.S. Supreme Court and a surge of buying in high-valuation tech stocks like AMD [1] Automotive Sector - Ford and General Motors, key indicators of the U.S. economy, both rose over 2% on Wednesday, while Caterpillar, an industrial equipment manufacturer, saw an increase of nearly 4% [3] AI and Tech Stocks - AI concept stocks experienced a turnaround, with AMD rebounding after an initial drop, and companies like Broadcom, Google, and Oracle also seeing gains. Micron Technology surged by 8.93%, reaching a new historical high, driven by rumors of rising HBM4 chip prices, while storage stocks Seagate and SanDisk both rose over 10% [4] - However, not all AI stocks rebounded; Supermicro fell over 11% after releasing its earnings report, and Arista Networks dropped nearly 9%, indicating a lack of breadth in the market [6] Major Stock Movements - Among major stocks, Nvidia fell by 1.75%, Apple rose by 0.04%, Microsoft decreased by 1.39%, Google-C increased by 2.41%, Amazon rose by 0.35%, Broadcom gained 2%, Meta increased by 1.38%, and Tesla saw a rise of 4.01% [7] Renewable Energy Sector - Solid Power's stock surged by 51.56% after a favorable earnings report, while SolarEdge rose by 28.91%, contributing to a strong performance in the battery storage and solar panel sectors [8] Chinese Stocks - The Nasdaq China Golden Dragon Index rose by 0.15%, with Alibaba up by 0.32%, JD.com increasing by 0.69%, and NIO rising by 1.82%. However, Pinduoduo fell by 1.87%, and several other Chinese stocks experienced mixed results [8] Earnings Reports - Arm's stock rose over 2% post-earnings, benefiting from increased interest in AI data center chip design. Qualcomm's stock fell over 4% despite better-than-expected earnings due to a $5.7 billion impairment charge related to U.S. tax changes. Robinhood's stock dropped nearly 2% after reporting third-quarter profits that exceeded expectations but fell short on cryptocurrency revenue [10] AI Developments - Apple is reportedly negotiating to pay Google $1 billion annually for a customized AI model, as it seeks to enhance its AI capabilities, particularly for an upgraded version of Siri [11] Legal Issues - Amazon has filed a lawsuit against Perplexity, seeking to prohibit the AI search startup from accessing its website through its AI browser, citing computer fraud and violation of service terms [12] Regulatory Concerns - The U.S. Federal Trade Commission has expressed concerns regarding Novo Nordisk's acquisition offer for the weight-loss drug developer Metacel, indicating potential violations of procedural laws for merger reviews, which led to a 2.46% drop in Metacel's stock [13]