Core services excluding shelter — "supercore" — computed from the official service subindexes this site carries (the components are listed below, from the engine's own definition), weights renormalized. It is the Fed's preferred read on sticky, wage-driven inflation.
Goods prices swing with supply chains and energy; shelter lags by construction. What remains — services priced mostly on labor — is where inflation becomes self-sustaining. When supercore refuses to cool, wage pressure is feeding prices; that is the number that keeps the Fed hawkish.
Core services excluding shelter, following the BLS definition: transportation services, water, sewer and trash, medical care, education & communication and recreation, weights renormalized. BLS splits medical care, education & communication and recreation into goods and services; the Gauge carries each whole, goods included. Food, energy, shelter and the other goods groups are excluded. The components and their basket weights today: Medical Care 8.42% (1.50% year over year), Recreation 5.14% (2.82% year over year), Education & Comm 5.85% (2.32% year over year), Transportation Services 6.31% (2.77% year over year), Water, Sewer & Trash 1.14% (4.84% year over year) — 26.9% of the CPI basket, renormalized to 100% inside the index. Because these subindexes have no live market source they step only on CPI day; between prints the line is flat by construction, which is honest rather than a defect — supercore is a monthly statistic read from the official series, not a daily market price.
Supercore stands at 2.40% year over year (index 126.79, January 2018 = 100), against 2.78% a year earlier (October 18, 2025); over the last twelve months it ranged from 2.08% (December 18, 2025) to 2.78% (October 19, 2025). The Nowflation CPI Gauge reads 3.45% for all items and official core CPI 2.6% for September 2026, so supercore is -1.05pp against the all-items Gauge — the sticky-services pressure once food, energy, shelter and the other goods groups are set aside (medical care, recreation, and education and communication come in whole, their goods included).
Graded monthly against the official series since 2018 (104 months) the supercore variant correlates 0.6791 with a mean absolute gap of +1.16pp; the lower correlation than the headline variant reflects a narrower, noisier aggregate, not a live-source difference.
Goods prices swing with supply chains and the dollar; energy with crude; shelter lags by construction because the rent panel is repriced every six months. What is left — services priced mostly on labor — is where inflation becomes self-sustaining: firms raise service prices when wages rise, and wages rise when service prices do. A supercore reading that refuses to fall while headline cools is the signal that keeps the Fed cautious; a supercore falling toward 2% with shelter still elevated is the signal that the remaining inflation is a lagging survey artifact. The BLS does not publish a "supercore" line; it is a cut analysts build from the same subindexes, and definitions differ at the edges (this one carries the 5 subindexes listed above, as the engine defines it).