AI Infrastructure Debt Bubble 2026: $570 Billion in Global Debt Issuance Raises Systemic Risk Alarm

Morgan Stanley estimates AI-related global debt issuance will hit $570 billion in 2026, with hyperscaler spending exceeding $1 trillion by 2027. Oracle’s crisis may be the first systemic warning sign.
The question Wall Street was reluctant to ask openly throughout 2024 and most of 2025 is now unavoidable: is the AI infrastructure buildout generating a debt burden that markets have not yet properly priced?

The numbers have become too large to dismiss as routine capital expenditure cycles. Morgan Stanley estimates that AI-related global debt issuance will more than double to nearly $570 billion in 2026, with aggregate hyperscaler capital expenditure projected to exceed $1 trillion by 2027. That figure encompasses spending by Amazon, Microsoft, Alphabet, Meta, Oracle, and a growing constellation of second-tier infrastructure providers building the physical layer of the AI economy.

How the Debt Stack Has Built

The trajectory of Oracle’s balance sheet is instructive as a case study in the speed at which leverage can accumulate. In fiscal 2025, Oracle carried a net cash deficit of approximately $394 million after free cash flow. By the end of fiscal 2026, that had deteriorated to negative $23.7 billion in free cash flow, with long-term debt reaching approximately $124.7 billion. Capital expenditures of $55.7 billion in a single fiscal year represent a 162% increase from the prior year.

Oracle is not alone, though its position is the most stretched. The structural dynamic across the hyperscaler complex is that the companies investing most aggressively in AI data centre capacity are simultaneously facing competitive pressure on their existing software and cloud businesses from AI-native tools — creating a margin squeeze that occurs precisely when cash demands are highest.

Credit Default Swaps as an Early Warning System

One underappreciated signal in this cycle is the behaviour of credit default swaps. Fortune reported that Morgan Stanley’s Lisa Shalett flagged Oracle’s CDS widening as a potential early indicator of broader AI trade stress. CDS spreads — which function as insurance premiums against corporate default — had reached record levels for Oracle by early 2026, even before the most recent earnings-related stock decline.

The concern Shalett articulated was systemic rather than company-specific: “If people start getting worried about Oracle’s ability to pay, that’s gonna be an early indication to us that people are getting nervous.” For a company whose debt is included in major corporate bond indices, the widening of Oracle’s CDS spreads has implications not just for Oracle investors but for anyone holding investment-grade credit exposure broadly.

Bank of America Research described “the lack of clarity on hyperscaler borrowing” as “the key risk going into 2026” — a view validated by subsequent events as Oracle’s stock collapsed and CDS widened even further.

The OpenAI Nexus

A critical vulnerability embedded in the current AI infrastructure cycle is concentration around OpenAI as both the defining customer and the primary justification for hyperscaler spending. Oracle‘s remaining performance obligations are concentrated at least $300 billion in the OpenAI relationship. OpenAI itself is burning cash at what one analyst described as “an insane rate” and has committed to more than $1.4 trillion in total AI buildouts — a commitment that depends on the company’s own ability to sustain fundraising and ultimately generate revenue at scale.

The logical chain from that dependency is a concern articulated plainly by Melius Research: “It is hard to know if Oracle can stick to this capex plan if incremental business arises from the likes of OpenAI and Anthropic. Also, its competitors are unlikely to slow spending and could use Oracle’s spending moderation as the means to gain share.” The competitive dynamic creates a collective action problem: no single hyperscaler can slow down without ceding ground, yet the collective pace of spending is generating balance sheet stress across the sector.

Second-Order Vulnerabilities: Data Centre REITs and Chip Suppliers

The debt accumulation in hyperscaler balance sheets has second-order effects that are not captured in the headline AI capex numbers. Data centre real estate investment trusts — which provide the physical infrastructure that hyperscalers increasingly lease rather than own — have their own exposure to counterparty concentration and lease extension risk. Reports that Blue Owl, Oracle‘s primary data centre financing partner, declined to back the Michigan facility highlighted the fragility of the supporting ecosystem even when the primary tenant appears solvent.

Nvidia, whose chips underpin the entire AI buildout, has been insulated from these concerns by persistent demand that exceeds supply. But if even two or three hyperscalers simultaneously scaled back data centre spending in response to balance sheet pressures, the chip demand outlook would shift rapidly.

The Memory Shortage as Collateral Signal

CNBC reported in late June 2026 that “the memory shortage shaking Apple and Microsoft is an ‘existential crisis’ for smaller players” — a reminder that supply chain bottlenecks are not yet resolved, adding cost and execution risk to projects whose timelines are already being stretched. The combination of persistent demand exceeding supply, expensive debt financing, and uncertain monetisation schedules creates a financial engineering challenge that may prove harder to solve than the engineering challenges of building the data centres themselves.

The AI infrastructure cycle is not necessarily a bubble in the sense of zero underlying demand — the use cases are real and adoption is accelerating. But the debt structure being used to finance it, and the concentration of risk around a small number of foundational relationships, has introduced systemic vulnerabilities that markets are only beginning to price.