费半一夜跌近5%,光与存储集体“崩了”:美债利率飙升,AI信仰开始动摇

marsbit2026-08-19 tarihinde yayınlandı2026-08-19 tarihinde güncellendi

Özet

8月18日美股市场,AI硬件核心板块遭遇罕见抛售,费城半导体指数跌近5%,光通信与存储芯片股领跌。市场焦点从“AI资本开支想象”转向“资本成本”,主因是长期美债收益率飙升(30年期创2007年以来新高)推高贴现率,严重冲击盈利预期久期长的成长股。地缘局势推高油价,加剧通胀与利率上行压力。抛售集中于前期涨幅大、仓位拥挤的AI纯正品种(如HBM存储、高速光模块),其估值对资本开支叙事和利率高度敏感。此次下跌更多是估值与拥挤交易修正,而非AI基本面证伪。后市需关注美债收益率、油价及AI项目发债成本等信号。对A股相关板块,短期情绪冲击难免,但中期逻辑需结合国内资本开支与业绩兑现情况判断。市场正对AI投资进行更严格的回报率审视。

昨夜(8月18日)美股,AI硬件板块最锋利的两支矛,光通信与存储芯片,遭遇了本轮行情以来罕见的大面积抛售。费城半导体指数收跌4.98%,30只成分股全数下跌,创7月29日以来最大单日跌幅;美股三大指数连续第三个交易日收跌。

市场叙事的焦点正在切换,从“AI资本开支的无限想象”,切换为“这笔钱到底要付多高的利息”。

先看全景。道指收跌0.22%,标普500跌0.69%,纳指跌1.33%。表面看跌幅并不夸张,但把镜头拉近到AI硬件内部,会发现这是一场结构性踩踏。

存储板块全线重挫。铠侠ADR暴跌超13%,闪迪跌9.01%,希捷跌9.16%,西部数据跌7.43%,美光跌7.02%,SK海力士ADR跌超9%。光通信与AI基础设施板块跌幅更深。Fabrinet暴跌19.38%,Coherent跌12.75%,CoreWeave跌12.10%,Lumentum跌9.87%,迈威尔跌超6%,康宁跌超4%。

大型科技股亦难独善其身。Meta跌4.45%,英伟达跌2.34%;中概AI资产同步承压,百度因业绩发布收跌12.73%,世纪互联跌近17%。

一个值得注意的细节是,跌得最深的,恰恰是前期涨得最猛、AI叙事最“纯正”的品种。这不是一场普跌,而是AI叙事内部的定价重置。市场开始按不同的风险重新排序,首当其冲的就是久期最长、仓位最拥挤的资产。

三重压力与结构性因素

30年期美债收益率盘中一度触及5.337%,创2007年6月以来新高,19年来的最高水平。10年期收益率也一度升至4.75%,为2025年1月以来最高。这是一场全球性的长端利率上行,日本10年期国债收益率升至30年最高,德国30年期创2011年以来新高,法国30年期为2008年以来最高。

有分析师对此的概括颇为精炼:“投资所要求的回报门槛又在提高。但这一次,不是因为市场重新上调短期利率预期,而是油价、政府债券供给,以及长端期限溢价共同作用的结果。”

对成长股而言,这无异于估值公式的分子分母同时恶化。成长股定价的本质是未来现金流的折现,贴现率每上一个台阶,盈利兑现期越远的资产杀伤越大。AI硬件股恰恰是美股市场“久期最长”的板块,它的盈利兑现被定价在三五年之后,对利率的敏感度远超其他行业。城堡证券的警告颇具代表性,美联储在通胀高于目标时不愿收紧货币政策,本身就推升了长债收益率的风险。

这一轮长债收益率的抬升,并非孤立的市场事件。高盛数据显示,今年迄今AI相关债券供给已达4890亿美元,超过2025年全年的3220亿美元;另有超过1万亿美元的AI年资本开支正涌入债市。AI行业的融资需求,正在与传统的主权国家借款方争夺资金。

一个典型案例足以说明问题。黑石旗下QTS为微软数据中心发行39亿美元、5年期债券,认购需求高达230亿美元,发行收益率达7.228%。这条信息有两个读数。其一,市场对AI资产的认购热情依然高涨;其二,7.2%的融资成本意味着数据中心项目必须赚回高于此的回报率。债券市场正在用真金白银给AI“算账”,而算出来的这道利息门槛,正在抬高每一项资本开支的回报要求。

特朗普政府暂停与伊朗的接触,特朗普本人称“目前和未来不会与伊朗进行任何会谈”,霍尔木兹海峡控制权的僵局仍未打破;伊朗议会议长则称海峡“将继续关闭”。布伦特原油涨至91美元/桶上方,WTI报84.94美元/桶,逼近85美元关口,标普500能源指数涨1.8%,创3月以来新高。

油价上行的传导路径并不复杂,油价→通胀预期→长端利率。但对成长股而言,这是最坏的组合,盈利预期与估值同时承压。分析师普遍判断布伦特原油将继续在70至100美元这一较宽区间内运行,地缘变量短期内很难消失。

三个结构性原因。

其一,涨幅最大、仓位最拥挤。HBM存储、800G/1.6T光模块是本轮AI行情中叙事最纯正、弹性最大的品种,前期积累了大量的动量资金与杠杆资金。拥挤交易的出清往往呈现两个特征,一是跌幅远超指数,二是修复需要更长时间,因为浮盈盘与杠杆盘同时夺路而逃,抛售往往以不计成本的方式完成。

其二,对资本开支叙事最敏感。存储和光通信的需求,直接挂钩云厂商资本开支的“加速度”而非“绝对值”。任何关于AI投资可持续性的质疑,都会首先冲击这一环节。它们是为“想象空间”定价的资产,而不是为“当期盈利”定价的资产。

其三,产业链弹性放大。光模块、存储企业的盈利与估值波动天然大于平台型龙头,一旦贴现率上行触发估值收缩,戴维斯双杀的幅度远高于盈利稳定的巨头。

但这里有一个容易被忽视的细节,本轮抛售并未伴随AI基本面的证伪。英伟达只跌了2.34%,而非崩盘式下跌,说明市场杀的是估值与拥挤度,而不是逻辑本身。真正的分歧在于,这是一次剧烈回调,还是趋势拐点。

三个指标决定方向

亚洲盘已经给出了第一轮回应。韩国KOSPI开盘跌5%,三星电子跌6.7%、SK海力士跌7.4%;日经225低开近1%。A股算力、光通信、存储板块同步承压,由于A股光模块龙头与美股光通信股联动极强,短期情绪传染难以避免。

后续走势,盯住三个指标。

第一,30年期美债收益率能否止步于5.3%附近。若继续上行并站稳,成长股的估值收缩尚未结束;若从该位置回落,超跌反弹的窗口就会打开。One Point BFG Wealth Partners首席投资官Peter Boockvar的判断代表空方:“如果利率继续沿这一趋势上涨,那么利率对股市产生冲击,不是‘会不会’的问题,而只是‘什么时候’的问题。”

第二,油价与地缘局势。布伦特能否维持在70至100美元区间、霍尔木兹海峡僵局如何演绎,直接决定通胀叙事是强化还是弱化。

第三,AI债券融资的定价信号。QTS这类发债的认购倍数与发行收益率,是市场对AI资产风险溢价最直接的投票;同时关注美联储对油价通胀的表态,这在很大程度上决定了长端利率的走向。

对A股而言,短期映射难免,但中期逻辑需要分开看。A股光模块与存储的中期驱动力,是国内云厂商资本开支与国产算力需求,与外盘利率的相关性并不完全同步。急跌之后既要警惕“错杀”,也要防范“高位补跌”,区别二者的关键,仍是资本开支的真实兑现。对持仓者而言,比预判指数更重要的,是复盘自己持有品种的盈利兑现节奏,业绩在报表上已经落地、估值仍在合理区间的品种,回撤更多是情绪扰动;而纯靠叙事支撑的高位品种,则需要用利率的尺子重新量一遍。

昨夜不是AI叙事的终点,而是定价逻辑的一次换挡,从“故事”切换到“利息”。当数据中心融资成本站上7%、30年美债收益率创下19年新高,每一分资本开支都必须回答回报率的问题。市场给AI算的这笔账,才刚刚开始。

(本文首发钛媒体APP,作者 | 硅谷Tech_news,编辑 | 秦聪慧)

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İlgili Sorular

Q文章指出昨夜美股AI硬件板块大跌的核心触发因素是什么?

A核心触发因素是美债收益率飙升,尤其是30年期美债收益率创下2007年以来新高。这提高了未来现金流的贴现率,对久期长、盈利兑现预期在未来的AI成长股(如光通信、存储芯片)估值造成了直接冲击。

Q除了利率因素,文章还提到了哪些共同导致市场担忧的原因?

A文章提到了三重压力:1) 美债长端利率飙升。2) AI行业巨额资本开支和债券融资(今年已超4890亿美元)与传统主权债争夺资金,推高了融资成本(例如数据中心债券发行收益率达7.2%)。3) 地缘政治紧张(如霍尔木兹海峡僵局)推高油价(布伦特原油突破91美元),加剧了通胀预期,进一步利空成长股。

Q为什么文章说光通信和存储板块是本轮下跌中受冲击最严重的?

A主要有三个结构性原因:1) 前期涨幅最大、资金仓位最拥挤,积累了大量杠杆和动量资金,一旦转向容易引发不计成本的踩踏式抛售。2) 它们的需求高度依赖于AI资本开支的“加速度”,对投资可持续性的叙事最敏感。3) 作为产业链弹性环节,其盈利和估值波动性天然大于平台型龙头,在贴现率上行时更容易遭遇“戴维斯双杀”。

Q文章认为这次大跌是否意味着AI投资逻辑被证伪?为什么?

A文章认为并未证伪AI基本面的逻辑。关键证据是英伟达仅下跌2.34%,而非崩盘式下跌。这表明市场主要是在杀估值和拥挤交易,调整的是对未来盈利过于乐观的贴现和风险溢价,而非彻底否定AI的长期趋势。真正的分歧在于这是一次剧烈回调还是趋势拐点。

Q对于后续市场方向,文章建议关注哪三个关键指标?

A文章建议关注三个指标:1) 30年期美债收益率能否在5.3%附近止步,这决定了成长股的估值收缩是否结束。2) 油价(如布伦特原油)走势及霍尔木兹海峡等地缘局势,这影响通胀叙事。3) AI相关债券(如QTS为微软数据中心发行的债券)的认购倍数和发行收益率,这是市场对AI资产风险溢价的直接定价信号。

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