AI Data Center Bonds Are Being Priced As Project Finance At Last

June 19, 2026 - 11:02

For the past two years, investors treated data center bonds as if they were backed by the credit of the big tech company leasing the space. If Microsoft or Amazon signed the lease, the debt was priced like Microsoft or Amazon debt. That shortcut is now breaking down, according to a new note from Citigroup. The bank points to a recent bond deal tied to a Microsoft data center as evidence that the market is shifting toward a project finance model.

In the old view, a hyperscaler's name on the lease was enough to make the bond trade like the tenant's own corporate debt. But as data center construction costs soar and power supply becomes uncertain, lenders are demanding a closer look at the underlying project. The Microsoft-linked bond, issued by a special purpose vehicle, priced with a yield that reflected the specific risks of the facility, not just the tenant's credit rating. Citi analysts say this marks a turning point. Investors now want to see the power purchase agreements, the construction timeline, and the operator's track record before they buy.

The change means higher yields for some data center bonds, but also more complexity for issuers. For the hyperscalers, it could mean higher financing costs for their expansion plans. For bond buyers, it means doing more homework. The era of the easy shortcut is over.