Global financial markets faced a sharp jolt of confidence loss in October 2026, as the stratospheric artificial intelligence boom collided with soaring borrowing costs and a severe reassessment of neocloud infrastructure investments.
Neocloud Providers Face Sell-Offs over Rising Debt Costs
The greatest market damage centered on a cluster of lesser-known infrastructure providers known as neoclouds. Companies including CoreWeave, Nebius, and Iren endured heavy sell-offs as investors balked at mounting financial losses and inflated borrowing expenses tied to data center construction.
Unlike established hyperscale technology giants such as Microsoft and Amazon—which have funded early infrastructure development through existing, profitable operations—newer market entrants rely heavily on aggressive fundraising. These firms issue debt and sell shares to finance the massive industrial facilities required to power modern artificial intelligence systems.
CoreWeave, the sector’s largest operator, raised $32 billion in debt and equity to construct 51 data centers, despite recording just $4.6 billion in revenue during the first six months of the year. Similarly, British rival Nscale arranged deals to secure nearly $10 billion in debt alone despite having operated for only two years. These fundraising efforts have depended on pipelines of future contracts, with both CoreWeave and Nscale boasting over $100 billion in potential deals contingent upon infrastructure delivery.
However, rising global interest rates driven by persistent inflation concerns have converged with shifting corporate demands. Analysts at Barclays noted that major artificial intelligence software developers like OpenAI and Anthropic have pivoted away from securing capacity at any price, focusing instead on acceptable financial returns.
Borrowing expenses climbed sharply across the sector, with interest rates on portions of CoreWeave’s debt briefly touching 16 per cent. Although the company maintains fixed rates on existing borrowings, the spiking cost signaled growing friction for future capital acquisition.
Ken Griffin Warns of Bubble as Analysts Cut Valuations
Citadel chief executive Ken Griffin warned investors that the rapid transformation of the economy was intertwined with a bubble, stating that the market was “almost certainly” inside one during a New York conference.
Financial institutions quickly adjusted valuations downward. HSBC analysts issued a research note declaring CoreWeave overvalued by 50 per cent, estimating the company’s return on investment at 8.9 per cent—substantially below its borrowing costs. The note projected that CoreWeave would remain unprofitable through 2029, and its shares dropped by one-third over several weeks.
Broader market distress stalled several public market debuts. Australian data center operator Firmus cancelled a $44 billion initial public offering, and Singapore-based DayOne faced potential delays. Meanwhile, London-based Nscale pursued its own market float with backing from the British government, though investors lowered valuation forecasts.
Nvidia chief executive Jensen Huang addressed the market turbulence during a television interview with CNBC, characterizing the sector’s friction as a “scarcity of capital” rather than softening consumer demand. Huang maintained that fundamental demand for neocloud capacity remained exceptionally high.
Industry analysts warned of systemic risks should infrastructure providers fail to generate sufficient revenue to service obligations. Joachim Klement of Panmure Liberum cautioned that neoclouds unable to meet debt requirements risked entering a “death spiral.” Meanwhile, Gartner analyst Will Sommer predicted that $3.5 trillion in planned artificial intelligence infrastructure spending could face write-offs by the end of the decade, estimating that 80 per cent of neoclouds would either be acquired or cease independent operations by 2030.
