Wall Street’s AI trade got a second wind on Monday. After a bruising week that knocked roughly $2 trillion off the Philadelphia Semiconductor Index and sent neocloud names into freefall, AI-linked stocks bounced as Treasury yields eased, oil cooled, and Goldman Sachs upgraded CoreWeave to “buy.”
The rebound matters because it tests whether last week’s plunge was a healthy reset—or the start of a longer rethink of how investors price AI growth, debt, and earnings. Meta, Tesla, and SpaceX results later this week will be the next checkpoint.
Why AI Stocks Were Hammered Last Week
Last week’s AI selloff was not a single headline. It was a pile-up of worries: hotter September inflation, higher odds of future Fed rate hikes, and fresh anxiety about debt-funded AI infrastructure.
The Philadelphia Semiconductor Index fell more than 11% on the week and shed about $2 trillion in market value across an eight-session losing streak through Friday—its longest since October 2008, according to Reuters. Chip stocks were among the hardest hit. Micron slid nearly 15% last week before bouncing Monday.
CoreWeave became the poster child for leverage fears. Shares lost more than a quarter of their value last week as investors focused on the company’s roughly $50 billion debt load. Yields on a CoreWeave bond maturing in 2031 climbed above 16% at the worst of the stress, Tradeweb data showed via Reuters—signaling that credit markets were demanding a steep premium to finance AI buildouts.
Hotter inflation was the catalyst that turned skepticism into selling. September consumer prices rose 3.7% year over year, per the Bureau of Labor Statistics, raising bets that borrowing costs could stay elevated. For companies that fund data centers with debt, that is not an abstract risk.
What Changed on Monday’s Rebound
By Monday, Oct. 19, the tone improved. Reuters reported that AI-linked stocks bounced as government-bond yields fell and crude oil prices eased. CoreWeave rose in choppy trading after Goldman Sachs upgraded the stock to “buy” from “neutral.”
Goldman’s case was straightforward: tight computing capacity and CoreWeave’s performance edge over rival neocloud firms should lift annual recurring revenue per megawatt over the next two years. The firm framed the pullback as a buying opportunity. The yield on CoreWeave’s 2031 bond eased to about 15.13%, down roughly 19.5 basis points from last week’s peak stress levels, according to Tradeweb data cited by Reuters.
Peers joined the bounce. Nebius Group gained after tumbling more than 31% over two weeks. Data-center operators Applied Digital and IREN also rose sharply. Nvidia, AMD, Broadcom, and Micron all posted gains after last week’s declines, while Intel climbed after J.P. Morgan upgraded it to “neutral” from “underweight,” citing rising agentic AI workloads and tight advanced-chip supply.
Not everyone called it a durable turn. Thomas Hayes, chairman at Great Hill Capital, told Reuters the debt debate will remain a “constant push-pull,” warning that Monday could still be a short-lived bounce while bond markets stay skeptical about financing AI without higher yields.
The Bigger Question: Will Investors Keep Paying for AI Growth?
The rebound does not erase the valuation debate. Morgan Stanley still expects total AI investment to surge to $1.6 trillion in 2027 and $1.8 trillion in 2028, Reuters reported—numbers that underscore how large the opportunity looks to long-term bulls.
Ohsung Kwon, chief equity strategist at Wells Fargo, said it is too early to see a meaningful hit from higher rates and expects AI capital spending to strengthen into 2027. That view sits beside a harder question from Jay Woods, chief market strategist at Freedom Capital Markets: the issue this quarter is not whether AI will grow, but whether investors will keep paying a premium for that growth.
That is why this week’s megacap earnings matter. Meta Platforms, Tesla, and SpaceX are due to report, along with semiconductor names such as Lam Research, Texas Instruments, and Western Digital. Investors will listen for proof that AI spending is showing up in revenue and margins—not only in capital budgets.
What U.S. Readers Should Watch Next
If you follow the AI trade from the sidelines or through broad index funds, three signals matter more than any single Monday bounce:
Credit spreads and bond yields for AI infrastructure firms. Equity rebounds can fade if credit markets keep demanding double-digit yields to finance buildouts.
Earnings commentary from hyperscalers and chipmakers. Management guidance on AI returns will shape whether Monday’s rally sticks.
The Fed path after September’s 3.7% inflation print. Higher-for-longer rates raise the cost of capital for leveraged AI plays even if the October meeting is a pause.
This is for information only, not financial advice.
Key takeaways
- AI stocks bounced Monday after a week that cut about $2 trillion from the Philadelphia Semiconductor Index and sent CoreWeave shares down more than 25% (Reuters).
- Goldman Sachs upgraded CoreWeave to “buy,” citing tight compute capacity and a revenue-per-megawatt opportunity; CoreWeave’s 2031 bond yield eased to about 15.13%.
- Nebius, Applied Digital, IREN, Nvidia, AMD, Broadcom, Micron, and Intel participated in the rebound to varying degrees.
- Morgan Stanley sees AI investment rising to $1.6 trillion in 2027 and $1.8 trillion in 2028; Wells Fargo expects AI capex to strengthen into 2027.
- Meta, Tesla, SpaceX, and several chipmakers report this week—key tests of whether investors will keep paying a premium for AI growth.
Sources
- Reuters via Financial Newsletter: AI stocks bounce back; CoreWeave Goldman upgrade
- U.S. Bureau of Labor Statistics: Consumer Price Index — September 2026
- AP News: AI stocks lead a rebound on Wall Street
- Investor’s Business Daily: AI stocks face earnings gut check
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