Market Performance - The US stock market continued its post-Christmas pullback, with all three major indices closing lower, marking a subdued end to 2025. The S&P 500 index fell by 0.74% to 6845.5 points, the Nasdaq Composite dropped by 0.76% to 23241.99 points, and the Dow Jones Industrial Average decreased by 0.63% to 48063.29 points [1]. - For the year, the S&P 500 recorded an annual increase of 16.39%, while the Nasdaq managed a 20.36% rise, achieving over 20% growth for three consecutive years. The Dow Jones also rose by 12.97%, marking a similar performance for the third year in a row [3]. Individual Stock Performance - Among the top performers in the S&P 500, four storage giants—SanDisk, Western Digital, Micron Technology, and Seagate Technology—led the annual gains. Semiconductor stocks like Lam Research, AI application leader Palantir, and Comfort Systems, which provides HVAC solutions for data centers, also featured prominently [3]. - In the tech sector, only Google and Nvidia among the "Big Seven" tech companies outperformed the benchmark index in 2025 [8]. Commodity and Sector Movements - US silver futures experienced a significant drop of 9% due to a second margin increase by the CME Group within a week, negatively impacting the mining sector. Companies like Endeavour Silver and Silvercorp Metals saw declines of over 4% and 2.8%, respectively [11]. Chinese Stocks - The Nasdaq Golden Dragon China Index closed down 1.13% but recorded an annual increase of 11.33%. Notable Chinese stocks included Alibaba, which rose over 75%, and Netease, which increased by 58.28% [12]. Corporate News - Warren Buffett officially retired as CEO of Berkshire Hathaway on December 31, 2025, after a long tenure, although he will remain as chairman of the board [13]. - Tesla achieved a milestone with a driver completing a coast-to-coast journey using full self-driving technology, marking a significant advancement in autonomous vehicle capabilities [15]. - Nvidia and AMD are expected to enter a "year-long price increase cycle" for GPUs, driven by rising memory costs, with flagship models potentially reaching prices as high as $5000 [16]. - Trump Media & Technology Group announced plans to issue a new cryptocurrency to shareholders, despite a significant annual decline in stock value [17]. - Brookfield Asset Management is launching a cloud computing business to challenge tech giants like Amazon, aiming to reduce AI development costs [18]. - Uber is in talks to acquire the parking app SpotHero, which could create synergies between ride-hailing and parking services [19].

报道称，面向 AIB（板卡厂）品牌的 AMD GPU 可能会在 2026 年 1 月就迎来首轮涨价，并在接下 来几个月内多次上调；而英伟达面向 AIC（加装卡）品牌的 GPU 则预计从 2 月开始涨价。在 12 月 期间，部分品牌已经进行了小幅提价，但也有品牌按兵不动。至于 1 月是否执行涨价，将由各家 AIC 厂商自行决定。 目 前 RDNA 4 产 品 线 的 GPU 型 号 数 量 有 限 ， 而 大 多 数 上 一 代 产 品 已 经 进 入 EOL （ 生 命 周 期 终 止）。AMD 计划在 2026 年 1 月提高价格，英伟达则预计在 次月跟进。这意味着 RX 9000 系列和 RTX 50 系列显卡在未来两个月内都将变得更加昂贵，而且涨价并不会就此停止。Board Channels 还表示，未来几个月里，两家公司可能会几乎每个月都上调一次 GPU 价格。 目前尚不清楚具体涨幅，但 GPU 核心 + 显存（VRAM）本身的成本，在交付给 AIB 厂商时就已占 到整卡成本的近 80%。与此同时，我们已经看到 DDR5 以及其他主流 DRAM 模块价格快速上涨， 内存成本几乎出现了 两到三倍、甚至三 ...