How We Scored History
Every month of Arizona’s luxury market, 2007–2026, under the published methodology
The index went live in August 2026. Everything before that is a reconstruction: the frozen methodology run backward across the complete MLS record — the same construction, the same seasonal correction, the same norm. These pages did not exist contemporaneously, and each one says so. That is precisely what makes them checkable: the method is published, the full series is downloadable, and anyone with the data can reproduce every number. All readings are measured against a single fixed norm anchored to 2021–2026; years before the recent surge in luxury activity therefore read low on the same ruler, by design — the scale is never re-fit to flatter an era. New months of the reconstruction release weekly until the record is complete; the issue archive holds everything published live since launch.