2026年2月24日凌晨，对于全球投资者来说，又是一个不眠之夜。 美国股市在周一交易时段上演了一场惊心动魄的大跳水，三大主要指数全线重挫，跌幅均 超过1%。 道琼斯工业平均指数一口气跌掉了821.91点，收盘报在48804.06点，跌幅达到1.66%。 标准普尔500指数下跌了71.76点，收于6837.75点，跌幅为 1.04%。 以科技股为主的纳斯达克综合指数也未能幸免，下跌258.80点，收于22627.27点，跌幅为1.13%。 整个市场一片哀嚎，数据显示当天有接近4000只 个股收跌，上涨的股票只有1000多只，市场情绪跌至冰点。 | 这场暴跌并非毫无征兆，但其猛烈程度依然超出了许多人的预期。 | | --- | | 盘面上，软件服务、信息技术服务、金融等板块成为了重灾区，跌幅居前。 | 而贵金属和有色金属板块则逆势走强，成为少数上涨的亮点。 这种板块间的极端分化，清晰地揭示了资金在恐慌情绪下的流向——从高风险的风险资产流 向黄金等传统的避险资产。 现货黄金价格在当天站上了每盎司5200美元的关键关口，日内涨幅超过2%。 在众多下跌的股票中，有一家百年老店的惨状格外引人注目。 国际商业机器公司，也就 ...

凤凰网科技讯北京时间2月25日，据CNBC报道，亚马逊通用人工智能(AGI)实验室负责人、华人高管大 卫.栾(David Luan)周二宣布离职，任职不到两年。此前，他通过亚马逊对其创业公司Adept的人才式收 购加入了亚马逊。 大卫.栾周二在领英上宣布，他将于本周末离任，"去搞点新名堂"。 大卫.栾 大卫.栾宣布离职的帖子 在大卫.栾宣布离职前，亚马逊于去年年底宣布对其AGI部门进行重大重组，将其划归至在公司任职27 年的资深员工、云业务高级副总裁彼得.德桑蒂斯(Peter DeSantis)麾下。 亚马逊在2024年6月从Adept聘用了大卫.栾及其他几位高管。同时，亚马逊还从Adept获得了技术授权， 包括其部分AI模型和数据集。该交易的具体金额尚未披露。(作者/箫雨) 亚马逊在2024年12月任命大卫.栾负责其新成立、位于旧金山的AGI实验室。该实验室专注于"长期研究 项目"，包括开发"实用的AI智能体"。去年，该团队发布了亚马逊Nova模型的扩展应用Nova Act智能 体。亚马逊希望借此与OpenAI的ChatGPT、Anthropic的Claude以及谷歌的Gemini等领先AI模型展开竞 争。 ...

David Luan, who led Amazon's San Francisco-based AGI Lab and oversaw one of its most important agentic AI initiatives, is leaving less than two years after joining the tech giant through an acqui-hire deal involving him and other leaders from AI startup Adept. Luan announced his exit Tuesday in a LinkedIn post, saying he will leave at the end of the week "to cook up something new.†"There's incredible work to be done at Amazon and opportunities for me to take on more areas. But with AGI so close, I decided ...

*Anthropic新产品提振软件股 *AMD与Meta达成芯片协议 *中概股多数走高 美国股市周二收高，科技股领涨。市场对人工智能前景的热情重新升温，暂时盖过了此前关于该技术可能对多个行业造成颠覆的担忧。 道琼斯工业指数上涨370.44点，涨幅0.76%，收于49174.50点；标普500指数上涨52.32点，涨幅0.77%，收于6890.07点；纳斯达克综合指数上涨236.41点，涨 幅1.05%，收于22863.68点。 标普500指数板块中，非必需消费品板块和科技板块涨幅居前，医疗保健板块表现最弱。 DocuSign股价上涨2.6%，此前Anthropic表示其Claude Cowork现在可以连接到DocuSign以及企业现有的其他工具，如Drive和Gmail。此举让投资者感到乐 观，认为人工智能或许能够弥补软件公司，而非取代它们。 这种乐观情绪也延伸到了软件领域的其他板块。赛富时和ServiceNow的股价分别上涨了4.1%和1.7%。iShares扩展软件与技术行业ETF上涨2%。 FactSet上涨5.9%，汤森路透美股上涨11.5%，Salesforce上涨4.1%，成为道指涨幅居前个股之 ...

From personalised recommendations to automated workflows, AI has moved from a nice-to-have feature to a core technology. And, few companies are as deeply integrated into this shift as Alphabet Inc. (NASDAQ: GOOG). AI has already been woven into the company’s platforms that are used by billions of people everyday. From Google Search and YouTube advertising, to cloud services used by businesses worldwide. Although the AI excitement has pushed up valuations across the tech sector, Alphabet has yet to be re-rat ...

美国股市周二收高，科技股领涨。市场对人工智能前景的热情重新升温，暂时盖过了此前关于该技术可能对多个行业造成颠覆的担忧。 道琼斯工业指数上涨370.44点，涨幅0.76%，收于49174.50点；标普500指数上涨52.32点，涨幅0.77%，收于6890.07点；纳斯达克综合指数上涨236.41点，涨 幅1.05%，收于22863.68点。 【热门股表现】 苹果上涨2.24%，苹果公司周二宣布，将大幅扩建其在休斯顿的工厂运营，首次将Mac mini带到美国本土进行生产。 *Anthropic新产品提振软件股 *AMD与Meta达成芯片协议 *中概股多数走高 周一因冬季风暴重挫的航空和旅游板块强劲反弹，涨幅约2.9%。道指成分股家得宝上涨2.0%，此前公司第四季度业绩超预期并维持全年财测。 热门中概股多数上涨，纳斯达克中国金龙指数上涨1.37%。阿里巴巴上涨0.23%，拼多多上涨1.06%，网易上涨0.73%，京东上涨1.07%，携程上涨1.59%，腾 讯音乐上涨1.77%，理想汽车上涨1.30%，贝壳上涨1.18%，小鹏汽车大涨6.78%。百度下跌0.23%，中通下跌0.14%，富途控股下跌1.89%，蔚来持 ...

Core Insights - The discussion centers around the performance and outlook of major tech companies, particularly Nvidia, Tesla, and the so-called "Magnificent Seven" (Mag-7) stocks, which include Apple, Microsoft, Meta, Google, Amazon, and Nvidia. The sentiment is cautious, with a focus on the potential for volatility in the market and the importance of strategic investment decisions. Group 1: Nvidia and Market Sentiment - Nvidia's upcoming earnings report is anticipated with uncertainty, as past earnings have not consistently led to stock price increases despite strong performance [4][5][20] - The speaker has reduced their Nvidia position, citing a lack of confidence in the stock's ability to maintain upward momentum post-earnings [6][22] - The overall market sentiment indicates that while 60% of S&P 500 stocks are outperforming the index, the Mag-7 stocks have seen pullbacks, suggesting a potential shift in market dynamics [7] Group 2: Analysis of Major Tech Companies - Apple is viewed as having the best risk-reward profile in the market, with expectations of steady returns through buybacks, although it may not double in value [8][60] - Microsoft is compared to Exxon in terms of forward P/E ratios, with a preference for holding Microsoft due to its growth potential [8][13] - Meta is seen as a strong contender in the AI space, with a recommendation to buy if the stock price falls below $620 [9] Group 3: Memory and Semiconductor Sector - The memory market is experiencing significant price increases, with prices for SanDisk memory cards reportedly doubling over the last 90 days due to supply constraints [25][29] - The speaker believes that the memory bottleneck will persist, contrary to some analysts who predict an expiration date for this issue [26] - Companies like Seagate, Western Digital, and Micron are highlighted as potential investment opportunities within the memory sector [27][29] Group 4: Energy Sector Insights - The energy sector has shown strong performance, with a 23% increase year-to-date, and specific companies like Devon Energy and Schlumberger are recommended for their solid fundamentals [30][32] - The speaker emphasizes the importance of dividends and low debt in selecting energy stocks, with MPLX highlighted for its attractive yield [33] Group 5: Investment Strategy and Tools - The use of analytical tools like TrendSpider and Seeking Alpha is emphasized for making informed investment decisions, particularly in volatile markets [34][36] - The speaker advocates for a buy-and-hold strategy, focusing on a limited number of stocks to manage effectively [56][86] - The importance of having cash reserves for potential market dips is also noted, allowing for strategic buying opportunities [72][74]

Core Viewpoint - Amazon's $200 billion capital expenditure plan focused on AWS and AI infrastructure has led to mixed investor sentiment, with significant implications for its financial performance and market position [1]. Group 1: Financial Performance - Amazon's stock fell 18% following a $1.2 billion revenue miss and the announcement of a $200 billion capex plan for 2026 [1]. - In 2025, Amazon's capital expenditures reached $131.8 billion, consuming 94.5% of its operating cash flow, while free cash flow dropped to $14.8 billion from $47.7 billion [1]. - The trailing twelve-month free cash flow decreased to $7.7 billion from $32.9 billion a year earlier [1]. Group 2: AWS and AI Growth - AWS re-accelerated to 24% growth in Q4 2025, achieving a $142 billion annualized run rate, marking the fastest growth since 2022 [1]. - Amazon's Trainium2 AI chips experienced a 150% quarter-over-quarter growth, indicating strong demand in the AI sector [1]. - As of February 2026, AWS generated a disproportionate share of operating profit despite accounting for roughly 20% of Amazon's total sales [1]. Group 3: Market Sentiment and Analyst Opinions - Investor sentiment on Reddit fluctuated, with a low score of 23 on February 5 rebounding to 72 by February 18, reflecting a divided view on Amazon's future [1]. - 41 of 44 analysts rated Amazon as a Buy or Strong Buy, with a consensus price target of $279.59, while Morgan Stanley set a target of $300 [1]. - Prediction markets show only a 6.7% chance that Amazon will close above $220 by the end of the month, indicating skepticism among some investors [1].

美股三大指数集体收涨，纳指涨1.04%，标普500指数涨0.77%，道指涨0.76%。半导体板块领涨，AMD 收涨逾8%，英特尔涨近6%，台积电涨超4%。大型科技股多数上涨，特斯拉、奈飞、苹果涨超2%，微 软、亚马逊涨逾1%，英伟达、Meta小幅上涨；谷歌小幅下跌。 来源：市场资讯 （来源：科创100ETF基金） ...

The head of Amazon's artificial general intelligence lab is leaving the company less than two years after joining through a so-called acqui-hire deal of his startup Adept. David Luan announced his departure Tuesday in a LinkedIn post, saying he will exit at the end of the week "to cook up something new." Amazon tapped Luan in December 2024 to oversee its newly created AGI lab, based in San Francisco. The lab is focused on "long-term research bets," including developing "useful AI agents." Last year, the gro ...