Key Takeaways Liquidia Corporation shares have gained 43.9% since an October upgrade, far outpacing the S&P 500's rise.Shares of WDC have climbed 52.8% since its October Outperform upgrade, beating the S&P 500 by a wide margin.JNJ has returned 19.3% over 12 weeks, benefiting from investor demand for quality dividend stocks.The U.S. stock markets ended the week mostly lower, with the tech-heavy Nasdaq Composite and the S&P 500 slipping by 1.49% and 0.28%, respectively, due to a sharp selloff in tech stocks. ...

凤凰网财经讯 12月15日，美股三大指数集体高开，道指涨0.31%，纳指涨0.58%，标普500指数涨 0.47%。 热门中概股多数下跌，纳斯达克中国金龙指数跌0.56%，百度跌超2%，阿里巴巴、理想汽车跌超1%。 存储概念股普涨，美光科技涨逾2%，西部数据、希捷科技涨超1%。 【甲骨文单季度新增1500亿数据中心租赁承诺】 其他市场消息 【扫地机器人鼻祖iRobot宣布破产重组】 截至发稿，知名扫地机器人开发商iRobot盘前重挫73%。公司上周日宣布提交破产保护申请并披露，将 退市并成为中国代工厂的全资子公司。公司预计，若破产程序获批，公司普通股持有人将不会获得重组 后公司的股权。 当地时间上周五（12月12日），纳斯达克公司公布了纳斯达克100指数年度成分股调整结果，宣布将有 六家公司加入该指数，存储牛股希捷科技和西部数据在列，另外4家为阿尔尼拉姆制药、法罗里奥集 团、因斯梅德公司和芯源系统。调整将于2025年12月22日（周一）开盘前生效。 【赛诺菲多发性硬化症新药遇挫】 周一美股盘前，法国跨国制药企业赛诺菲股价一度下挫逾4%，因其一款用于治疗多发性硬化症的实验 性药物遭遇双重打击：一项后期临床试验未 ...

The Nasdaq-100 Index has announced its annual reconstitution, adding six new companies and removing six, effective Dec. 22.Six Stocks Added, Six Dropped From IndexThe six companies being added to the index are: Alnylam Pharmaceuticals, Inc. (NASDAQ:ALNY) , Ferrovial SE (NASDAQ:FER) , Insmed Inc. (NASDAQ:INSM) , Monolithic Power Systems, Inc. (NASDAQ:MPWR) , Seagate Technology Holdings plc (NASDAQ:STX) and Western Digital Corp. (NASDAQ:WDC) .The six companies being removed from the index are: Biogen Inc. (NA ...

Core Insights - Generative AI continues to be a significant trend in the stock market, impacting various industries and contributing to U.S. GDP growth [1] - The technology sector, particularly memory and storage companies, has seen increased demand due to the expansion of large language models [2] Company Performance - Seagate Technology's stock has surged 257% and Western Digital's has increased 316% in 2025, driven by strong demand for high-capacity hard drives [3] - Both companies are expected to maintain revenue and earnings growth through 2026, despite the challenges of balancing demand with capacity expansion [7][8] Market Dynamics - The demand for nearline storage has outpaced supply, allowing Seagate and Western Digital to raise prices, resulting in strong margin expansion [6] - HDDs remain the most common form of nearline storage, but competition from NAND storage and SSDs poses a threat to HDD makers [9][10] Competitive Landscape - Big tech companies are increasingly investing in NAND storage, which could lead to a shift away from HDDs if supply catches up to demand [14] - Seagate and Western Digital face competition from NAND chipmakers, which could impact pricing and market share [13][14] Valuation Concerns - Current forward P/E ratios for Seagate and Western Digital are 27 and 24, respectively, which may appear attractive compared to other AI stocks [15] - The cyclical nature of the HDD market and the interchangeable nature of their products with SSDs suggest that these companies may not maintain high valuations in the long term [16][18]

来源：滚动播报 纳斯达克公司宣布纳斯达克100指数成份股调整将于12月22日生效。6家公司即将被纳入纳斯达克100指 数。分别是艾尼拉姆制药公司、费罗维亚集团、英斯梅德公司、单片电源系统公司、希捷科技控股有限 公司和西部数据公司。而有6家被移出，百健公司（Biogen）CDW公司、格芯公司、露露乐蒙、安森美 半导体和交易台公司（The Trade Desk）。 ...

| 代码 | 名称 | | 涨跌幅 ^ | 盘前涨跌幅 | 总市值 | 年初至今涨跌 | | --- | --- | --- | --- | --- | --- | --- | | SNDK | SanDisk Corp | O | -11.43% | -3.91% | 313.62亿 | 510.38% | | WDC | 西部数据 | | -6.28% | -1.54% | 599.83亿 | 290.86% | | MU | 美光科技 | | -5.24% | -1.10% | 2756.21亿 | 191.85% | | RMBS | Rambus | | -5.00% | -1.10% | 108.41亿 | 90.51% | | STX | 希捷科技 | | -4.33% | -2.15% | 628.93亿 | 246.92% | | PSTG | Pure Storage | | -4.30% | -1.45% | 239.74亿 | 18.20% | | SIMO | 慧荣科技 | | -2.54% | -1.87% | 30.89亿 | 73.46% | 格隆汇12月12日｜美股市场存储芯 ...

周五，存储概念股纷纷下挫，SanDisk(SNDK.US)跌超12%，西部数据(WDC.US)跌超6%，美光科技 (MU.US)、希捷科技(STX.US)跌超4%。消息面上，Interactive Brokers首席策略师Steve Sosnick认为，市 场对整体AI交易的担忧是合理的，因为现在企业对AI已做出数万亿美元的投入承诺，但投资者很难判 断这些投入将如何演变，市场适度从这一板块撤出是正确的。 ...

智通财经APP获悉，周五，存储概念股纷纷下挫，SanDisk(SNDK.US)跌超12%，西部数据(WDC.US)跌 超6%，美光科技(MU.US)、希捷科技(STX.US)跌超4%。消息面上，Interactive Brokers首席策略师Steve Sosnick认为，市场对整体AI交易的担忧是合理的，因为现在企业对AI已做出数万亿美元的投入承诺， 但投资者很难判断这些投入将如何演变，市场适度从这一板块撤出是正确的。 ...

【会员专属闭门直播】 投AI + 全球配 > Al科技进入投资尾声? &投资组合复盘及展望 下载小帮知道APP，看直播更流畅 ◎川帮规划 本页内容不构成任何形式的投资建议或推荐。投资有风险，交易需谨慎！ 创始人介绍 小帮规划创始人、CEO © 小帮规划 · 哈佛大学统计学硕士 · 师从诺贝尔经济学奖得主- "期权之父"罗伯特·莫顿 曾就职于国际顶尖金融机构（摩 根士丹利ქ德意志银行、雪湖资 本），项目累计超过50亿美元 16年专业投资经验 7年投资者教育及家庭资产规划 ● 服务经验 具备证券、投顾、基金从业资格、霞观观 ● 本页内容不构成任何形式的投资建议或推荐。投资有风险，交易需谨慎！ 风险提示 & 声明 请注意，所有内容不构成任何形式的投资建议或 推荐，各位观众需要作出自己的投资判断。 9小帮以及小帮合作的任何IP无法保证用户100%。 ωが発でづ小帮规划 l [ [ ] [ ] [ ] ] [ ] ] [ ] ] [ ] ] [ ] ] ] [ ] ] ] [ ] ] ] [ ] ] ] [ ] ] ] [ ] ] [ ] ] [ ] ] ] [ ] ] ] [ ] ] ] [ ] ] ] [ ] ◎川 ...

U.S. IT Hardware 11 December 2025 Yipin Cai, CFA +852 2123 2669 yipin.cai@bernsteinsg.com Expert Insight: How much memory do AI Data Centers need? Mark C. Newman +1 212 845 7822 mark.newman@bernsteinsg.com Mark Li April Li +1 917 344 8339 april.li@bernsteinsg.com Phoebe Sun +1 917 344 8481 phoebe.sun@bernsteinsg.com Edward Hou, CFA +852 2123 2623 edward.hou@bernsteinsg.com We recently hosted a webinar with Gunjan Shah, a former Senior Cloud Engineer, AI & Machine Learning at Google, on AI data center memory ...