The AI buildout is now financed on guarantees, and the guarantees are getting bigger

The filing that names the number

Start with the filing, because it is the only document in this story with a legal signature behind it. Broadcom arranged for financial partners to take on agreements to purchase AI racks and related lease agreements on October 26, 2026, and Broadcom is providing residual value support to a newly formed special purpose vehicle. The maximum potential liability under the Backstop is approximately $43 billion on an undiscounted basis, and that liability is equal to the difference between 72.5% of the outstanding lease amounts and the value of the AI racks received upon sale. Broadcom believes the Backstop liability has a low probability of occurring. If a lease defaults, the remedies include assuming the lease, reselling AI racks at a fixed price, or arranging a sale of the racks. The structure is worth reading plainly: Broadcom is not booking the racks as its own purchase, but it is standing behind their residual value if the leases fail. m:…2008

Expansion keeps coming anyway

The expansion side of the story did not pause for the warning. CoreWeave announced an expansion of its global AI cloud platform with new capacity in Denmark, and says it is building a Petabit-scale global AI backbone network. The company has brought the majority of 22.5 MW of IT capacity online at atNorth DEN01, a facility that uses NVIDIA Blackwell systems connected with NVIDIA Quantum-X800 InfiniBand, and the network expansion begins in the fourth quarter of 2026 and extends to a full loop in mid-2027, with new points of presence in the UAE, India, Indonesia, Singapore, Australia, Korea and Japan. CoreWeave says its backbone uses 400 Gbps connections at each point of presence and hardware-based MACsec encryption for data in transit. m:…4788

Scale is the context for that expansion. CoreWeave operated 51 data centres worldwide as of June 30, 2026, had 1.5 gigawatts of active power as of that date, and had approximately 4.2 gigawatts of contracted power as of August 11, 2026, after completing its public listing on Nasdaq in March 2025. AMD and Meta added a different kind of commitment on the same day: AMD Helios rackscale solutions are currently installed and being tested by Meta, Meta is a lead customer for 6th Gen EPYC CPUs, and AMD will invest $1 billion in Meta equity offering. The two companies are also collaborating on future platforms including AMD Instinct MI500 series GPUs and future EPYC processor generations including Verano, and Meta will deploy a custom AMD Instinct GPU optimised for its workloads. Equity, testing and a custom chip together say more about commitment than a purchase order alone. m:…4788 m:…0486

What the market is pricing

Bank of America Research put a demand number on the same buildout. Total data centre spending is expected to reach $2.1 trillion by 2028, more than double the forecast from last year, according to the podcast discussion. The same discussion noted that America annual interest bill has more than doubled since fiscal 2021 to over $1.2 trillion, and that every additional 100 basis points of Reserve hikes adds an estimated $95 billion to the annual interest bill. The recent AI sell-off is largely a positioning-driven setback rather than evidence that the longer-term AI theme is breaking down, according to the BofA equity derivative strategy discussion. Read together, those claims describe a market that still believes in the demand, but is starting to charge more for the money that funds it. m:…6485

The warning from Gensler is the counterweight. He said the AI boom will likely decelerate and experience a reversal within the next 18 to 30 months, and that over $500 billion in new debt has been raised for AI this year, excluding the $63 billion Broadcom package. Kaplan and Gensler separately put the 2026 figure at approximately $500 billion in new debt raised for artificial intelligence projects, and described the US economy as currently experiencing a late-stage capital expenditure boom. Gensler also said capital markets historically tend to overfund during periods of technological exuberance, and that the US economy has limited fiscal room to address a potential AI-driven downturn. Those are predictions and judgements from podcast guests, not filings, and they should be weighted that way. But they land differently when read next to a filing that puts a $43 billion backstop in writing. m:…9854 m:…3993

What this means for a deal

This suggests the financing question is becoming the diligence question. A buyer or investor who only asks about chip performance is missing the structure that pays for the chips: who owns the racks, who leases them, who guarantees their residual value, and what happens if the lease defaults. Broadcom says its backstop has a low probability of occurring, and that judgement may prove right. The risk is not that any single guarantee fails, but that many guarantees were written on the same assumption at the same time, namely that rack values and lease demand would hold. AMD $1 billion equity investment in Meta shows the other model: put capital directly into the customer, rather than guaranteeing the hardware behind the customer. Both models are now live in the same market, and their outcomes will not be the same. m:…2008 m:…0486