US shelter inflation is finally turning: what October's CPI data shows

Owners' equivalent rent (OER) is the BLS's estimate of what homeowners would pay if they rented their own home from themselves. It is a survey-based imputation, not an actual transaction. OER represents approximately 26% of CPI-U, making it the single largest component. The rationale is that homeownership is a form of housing consumption, and OER captures its value consistently over time. Critics argue OER is slow to reflect actual housing costs. The alternative — using house prices directly — would make CPI much more volatile, as house prices can swing 10–20% annually.

Market rents (new leases) moved fast in 2021-22 because demand surged (pandemic migration, household formation, remote work moves) while supply was constrained. The CPI "stock" measure catches up slowly because it averages across all renters, most of whom are on leases signed before the surge. By early 2023, new-lease indices had flattened or fallen, but CPI shelter was still running at 8% because the 2021-22 surge was still flowing through existing leases. This large and temporary wedge between market rents and CPI shelter was one of the most important features of the US inflation cycle.