PIMCO, one of the leading bond management firms, has alerted investors to prepare for an impending credit default cycle. According to Chief Investment Officer Daniel Ivascyn, this shift marks the end of an unusually stable period in the market, with anticipated losses far exceeding what has been seen over the past few years.
What factors are driving this change? PIMCO's analysis highlights a surge in artificial intelligence-related capital expenditures that are straining the financial stability of lower-quality borrowers. This trend has seen companies increasingly relying on borrowed funds to finance substantial investments, particularly in the infrastructure needed to support AI operations. PIMCO estimates the issuance of debt linked to AI initiatives at around $100 billion per quarter. With hyperscale operators—the firms managing expansive data centers—leaning towards leveraged financing rather than using their cash reserves, concerns about financial resilience are rising.
PIMCO has documented these dynamics in detail in their report titled "AI Credit Expansion." It illustrates a notable increase in capital spending, which is now counterbalanced by decreasing free cash flow. Interestingly, PIMCO notes that the current financing environment appears to be more prudent compared to past cycles, such as the reckless spending during the late 1990s telecom boom when fiber optic cables were laid with little strategic foresight.
How is PIMCO navigating these developments? It is not merely an observer in this evolving landscape. In October 2025, PIMCO facilitated a record-setting private-debt deal worth $27 billion to finance Meta's Hyperion AI data center, resulting in approximately $2 billion in profits for the firm.
The opportunity in AI-related credit exists, but investors must exercise discernment. Identifying borrowers who have robust revenue streams and strong financial backing is crucial to mitigate risks. As the landscape shifts, Ivascyn has also noted the emergence of late-cycle stress indicators in the direct lending arena. This part of private credit involves non-bank lenders extending finances to mid-market companies. PIMCO's previous observations from March indicated troubling signs such as rising shadow default rates and the increasing use of payment-in-kind structures, which are signaling potential strain exacerbated by AI advancements and rising energy costs.
What implications does this have for investors? Ivascyn's warnings carry a clear message: the era marked by minimal loss potential is coming to a close. This shift poses significant risks, particularly for investment portfolios with substantial exposure to lower-rated borrowers. In contrast, investment-grade credits supported by companies with strong cash flows are likely to endure this cycle with relative stability. However, those invested in high-yield and leveraged loans—especially within the AI sector—will face a substantially more challenging environment as this credit cycle unfolds.