Looking back · SecondSource deep dive, October 23

Deep dive: AI data-center leases break before big clouds do

If AI data centers are overbuilt, long-term data-center leases and the debt of companies that rent out compute break before the big cloud companies' balance sheets do. Risk in the AI capital cycle sits partly in leases that haven't started and in compute lessors' debt, which the borrowing line alone misses. That deep dive rechecked SecondSource's July call. The half saying AI data centers will be overbuilt stands; the half saying "the four biggest buyers hold more cash than debt, so the 2002 telecom bankruptcy wave won't repeat" needs revising. Microsoft and Alphabet still hold more cash than debt, Meta only slightly more, and Amazon now has more debt than cash. Part of that debt now sits in data-center leases and in compute lessors' borrowing. Microsoft's annual report also lists US$329.1 billion of leases signed but not yet started, mostly data centers; the same report puts borrowing principal at US$46.1 billion. A lease figure is a multi-year total of payments, not the same kind of number as borrowing principal; the comparison only shows what the borrowing line leaves out. CoreWeave has US$10.6 billion due within 18 months, 1.9 times its cash on the same date, a sum SecondSource added up from the maturity table (SecondSource deep dive, 2026-10-23). The deep dive names the next comparison points: Meta's fourth-quarter results and CoreWeave's third-quarter report. How we checked →

Concept illustration: on the left wall, two signs hang one above the other, the upper lettered MICROSOFT beside a four-colour grid of squares and the lower lettered BORROWINGS, with a beige open-top holder containing one black folder beneath them. On the right, a huge stepped pile of brick-red bundles tied with pale bands rises toward the upper right and runs off the frame, with a large sign lettered LEASES set on its front, a pale pink rectangle behind it and a tiled floor below.

Source and checks

This item ran in the brief of Oct 31, 2026, alongside 7 other items. How we checked it, the quote checks and what was still missing that day are on that issue's How we checked page.

Cite this item

SecondSource (2026). "Deep dive: AI data-center leases break before big clouds do." https://secondsource.io/en/news/2026-10-31-3/. Accessed access date.