CoreWeave's credit stress and Microsoft's withdrawal from an Nscale project are separate events, but both show the pressure building around the AI infrastructure boom. One is a test of how much risk lenders will tolerate. The other is a reminder that even well-funded plans still need power and construction capacity.
CoreWeave's borrowing costs flash a warning
Reuters reported that CoreWeave has about $50 billion of debt, according to LSEG data. The cost of insuring that debt against default climbed to roughly 1,200 basis points, while yields on some bonds reached about 15% to 16%.
That distressed pricing does not mean a default is certain. It means investors are demanding substantially more compensation for the risk. A senior credit strategist at SMBC told Reuters that investors still appeared willing to finance data-center projects, but favored those closer to completion and carrying fewer hurdles.
Long-term customer contracts can make infrastructure loans more attractive because repayment is not based only on the resale value of GPUs. They can also create concentration risk when a borrower depends on a few large customers to honor and renew those deals. CoreWeave has major commitments from Microsoft, OpenAI and Meta.
An attached post relaying David Sacks's All-In comments framed payback time as a useful warning gauge: longer periods could reflect softer demand, lower spot prices or execution delays. That is commentary rather than a disclosed CoreWeave forecast, but it captures the question lenders are trying to price.
Nscale runs into the physical bottleneck
In a separate development, Reuters reported that Microsoft withdrew from an agreement for Nscale's proposed data center in Loughton, Essex. The Telegraph did not specify Microsoft's reason, and Microsoft declined Reuters' request for comment.
The Telegraph said the project had faced repeated delays and that grid officials did not expect to supply power until the 2030s. One attached post said the planned supercomputer would have used more than 23,000 GPUs.
Nscale told Reuters that its broader Microsoft relationship remained strong, said the grid problem did not affect other contracts and said it was exploring alternative power sources. The company also remained committed to the Loughton site.
