Data center boom reshapes commercial mortgage backed securities risks

For decades, the commercial mortgage backed securities market financed a fairly predictable cast of characters: office towers, shopping malls, apartment complexes. Then came the AI buildout, and the playbook went out the window.

Data-center mortgages have become one of the fastest-growing segments in CMBS, transforming a market that has historically rewarded those who understood cap rates and lease rollovers into one that now demands fluency in power-grid capacity and GPU depreciation cycles.

From rounding error to $30 billion

The scale of the shift is striking. Securitized lending backed by data centers was below $500 million before 2020. By 2025, that figure is expected to land somewhere between $27 billion and $30 billion.

JPMorgan projects the segment could reach $30 billion to $40 billion annually by 2026 and 2027, which would represent roughly 7 to 10 percent of combined CMBS and asset-backed securities issuance.

A maturity wall that dwarfs the office crisis

Atrium estimates that $128 billion in U.S. data-center debt comes due between 2025 and 2028. By 2029, that number climbs to $213 billion. For context, that figure exceeds the entire maturity wall facing U.S. office CMBS.

Analysts have flagged three structural concerns in particular. The first is tenant concentration: the market is dominated by a small group of hyperscale providers, meaning a single corporate decision by one of them can ripple across multiple securitized pools simultaneously. The second is technological obsolescence, the possibility that a facility built for today’s chip architecture becomes economically stranded as hardware generations turn over. The third is power-grid constraint, which is already binding in several major data-center markets and limits both new supply and the expansion of existing facilities.

Pricing the unknown

Risk premiums on data-center-linked CMBS have broadly risen. Recent deals have required wider pricing spreads, a signal that investors are demanding compensation for uncertainty they cannot yet fully model.

Overbuilding is already a concern in some metropolitan markets. The loans originated today will mature into whatever interest-rate and technology environment exists in 2028 and 2029, which is precisely when Atrium’s maturity estimates suggest the pressure will be most intense.

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