Chipmakers' Worst Slump Since 2008 Deepens as AI Financing Fears Hit CoreWeave

Wall Street closed out its worst week since June on Friday as a slide in semiconductor and artificial-intelligence-infrastructure stocks stretched into an eighth straight session, the longest such losing streak for chipmakers since the 2008 financial crisis. At the center of the selloff was CoreWeave Inc., the cloud-computing company that rents Nvidia chips to AI developers, whose stock and bonds have been battered for a week on fears that it and similar firms have taken on more debt than their businesses can support.

The S&P 500 fell 1.1% on Friday to 7,659.44, and the Nasdaq Composite dropped 2.1% to 26,140.03, according to a wire-service tally of how major US indexes fared. For the week, the Nasdaq lost 4.5% and the S&P 500 fell 1.9%, while the Dow Jones Industrial Average, less exposed to chip and AI names, actually rose 0.7%. The divergence captured a market increasingly nervous about one specific question: whether the money being borrowed to build out artificial-intelligence data centers can ever be paid back.

The numbers

CoreWeave, which went public in March 2025 and has become a bellwether for AI-infrastructure financing, had the roughest week of any large-cap stock in the sector. Its shares fell more than 8% in early Friday trading and were down more than 22% for the week, after sliding 15.5% on Wednesday alone, according to a Reuters report on the stock's bond-market troubles. The pressure showed up even more starkly in its debt: the yield on CoreWeave's dollar bonds maturing in 2031 briefly topped 16% on Thursday, and the cost of insuring the company's debt against default, measured in credit-default-swap spreads, surged past 1,000 basis points this week to a record high, according to S&P Global Market Intelligence data cited in that report.

• S&P 500: down 1.1% Friday, down 1.9% for the week, to 7,659.44
• Nasdaq Composite: down 2.1% Friday, down 4.5% for the week, to 26,140.03
• Dow Jones Industrial Average: down 0.3% Friday, up 0.7% for the week, to 52,002.41
• CoreWeave (CRWV): down more than 22% for the week; 2031 bond yield briefly above 16%

Other AI-infrastructure names fell in sympathy. Nebius Group posted its steepest weekly drop in two months, down 6.4%, while Applied Digital slipped 4.2% and IREN fell 5.5%, per the same Reuters account. Chipmakers broadly extended their slide: Micron Technology fell 5.6% and Intel lost 5.8% on Friday alone, part of an eight-session skid that marked the semiconductor industry's longest losing streak since the 2008 financial crisis.

How a debt-fueled buildout turned shaky

CoreWeave's business model depends on borrowing heavily to buy Nvidia graphics processors and build data centers, then leasing that computing power to AI developers under long-term contracts. The company has reported roughly $104 billion in revenue backlog as of the quarter ended June 30, 2026, and framed that backlog as proof its commitments are covered, according to its second-quarter earnings release filed with the Securities and Exchange Commission. But the company also carries roughly $50 billion in debt, and investors have grown increasingly focused on the gap between what it pays to borrow and what it earns on the equipment that debt buys, a concern visible across the dozens of regulatory filings CoreWeave has made with the SEC disclosing new financing arrangements over the past year.

That worry was sharpened this week by inflation data that undercut hopes for lower interest rates. The Bureau of Labor Statistics reported that consumer prices rose 0.6% in September, up from 0.4% in August, with gasoline prices alone accounting for more than half of the monthly increase; producer prices jumped 1.3% that same month, their largest monthly gain since March 2022. Hotter inflation raises the odds the Federal Reserve holds rates higher for longer, which matters enormously to a company refinancing tens of billions of dollars in debt. Yields across the Treasury market, visible in the Treasury Department's daily par yield curve data, have stayed elevated through the autumn, keeping borrowing costs high for companies like CoreWeave that rely on the corporate-debt market rather than cash flow to fund expansion.

The episode traces back to Wednesday, when a chart of CoreWeave's bond yields circulated widely on social media, including a post from investor Chamath Palihapitiya that drew a one-word reply, "Yikes," from Elon Musk, amplifying attention on the stock's slide. CoreWeave CEO Michael Intrator told employees in an internal memo, later confirmed by the company, that the market's reaction was irrational and that the firm's order backlog more than covered its obligations, arguing that troubled financings and delayed public offerings at rival AI-infrastructure firms were spilling over into perceptions of his own company.

Who is affected

The immediate losers are CoreWeave's shareholders and bondholders, along with investors in the smaller AI-cloud operators that traded down alongside it this week. But the selloff's reach extends further. Index funds tracking the Nasdaq and broad technology benchmarks absorbed losses as megacap chip and software names declined for an eighth straight session. Short sellers, by contrast, profited: bets against CoreWeave shares generated roughly $806 million in paper gains on Wednesday alone, one of the most lucrative single days for the stock's short sellers since it went public, according to data cited in the Reuters report. Some investors moved the other way. Cathie Wood's ARK Invest exchange-traded funds bought more than 381,000 CoreWeave shares over the two sessions through Thursday, and retail investors overall bought a net $66 million of the stock this week, the second-highest weekly total on record, according to Vanda Research data cited in the same reporting.

Employees are affected too, directly. Intrator's memo was addressed to CoreWeave's own staff, an acknowledgment that a week of brutal headlines about the company's finances was unsettling enough internally to warrant a direct message from the chief executive defending the business.

What people are saying

Wall Street's assessment of whether CoreWeave is a unique case or a warning sign for the broader AI-infrastructure trade is split. Todd Schoenberger, chief investment officer at CrossCheck Management, said the market's concern extends well beyond one company: he argued that "the revenue is just not going to be there to turn a profit" at several firms that have taken on similarly large debt loads to chase AI demand.

"You cannot take CoreWeave as the poster child for AI," said Tommaso Leodari, chief investment officer at the Dubai-based hedge fund Index & Cie, arguing the company's troubles do not by themselves signal the end of the broader AI investment boom.

Analysts at Evercore kept an "outperform" rating on CoreWeave shares through the rout, writing that the market was treating a higher secondary-market bond yield as proof the business model has stopped working, a conclusion they said they do not share. That split between bond-market pricing, which has moved to levels associated with meaningfully elevated default risk, and equity-research views, which remain largely supportive, is itself part of the story: it shows two sets of professional investors reaching different conclusions from the same set of facts about how much debt an AI-infrastructure company can safely carry.

What happens next

The immediate test comes from earnings. Netflix reports third-quarter results on Tuesday, followed over the next two weeks by a run of major technology and chip companies whose capital-spending plans and AI-related commentary will be read closely for signs of whether the infrastructure buildout is slowing or simply pausing for breath. CoreWeave itself does not report earnings again until early November, leaving its bonds and credit-default-swap spreads as the most-watched real-time gauge of investor sentiment toward it in the interim.

Beyond any single company, the week's events have put a sharper focus on the Federal Reserve's final two policy meetings of the year. Because so much AI-infrastructure spending has been financed with debt rather than cash, the path of interest rates has become unusually consequential for a sector that, a year ago, was valued primarily on growth expectations rather than balance-sheet risk. If inflation data continues to run hot into the Fed's December meeting, investors expect scrutiny of highly leveraged AI-infrastructure borrowers to intensify rather than fade, regardless of how CoreWeave's own backlog ultimately performs.