US Manheim Index Year-on-year, not seasonally adjusted
US Manheim Index Year-on-year, not seasonally adjusted stood at -1.22% in Sep 2026. It is one of the indicators in the Manheim Used Vehicle Value Index table (Value · Monthly), with a complete series running from Jan 1998 to Sep 2026. The complete series with an interactive chart, free to download.
This indicator in the Manheim Used Vehicle Value Index table
| Indicator | 09-2026 | 08-2026 | 07-2026 | 06-2026 | 05-2026 | 04-2026 | 03-2026 | 02-2026 | 01-2026 | 12-2025 | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| TOTAL MARKET (Jan 1997 = 100) | |||||||||||
| Year-on-year, not seasonally adjusted | -1.22 | 0.16 | 1.67 | 2.91 | 3.05 | 2.78 | 5.69 | 4.16 | 2.54 | 0.46 | |
| Wholesale Used Vehicle Price Index | 205.88 | 208.18 | 209.97 | 212.86 | 212.62 | 211.93 | 215.28 | 212.27 | 210.48 | 205.54 |
Understanding US Manheim Index Year-on-year, not seasonally adjusted
The US Manheim Index Year-on-year, not seasonally adjusted, tracks the unadjusted annual percentage shift in wholesale used vehicle values relative to the identical month twelve months prior. It encompasses total observed price velocity over an annual horizon without applying mathematical smoothing to account for holiday schedules or weather events. Users must avoid conflating this raw annual metric with seasonally adjusted equivalents that artificially modify baseline data for calendar convenience.
This indicator follows a strict monthly publication schedule, incorporating routine revisions to both current and historical baseline figures as reporting improves. Because the annual comparison window naturally aligns matching seasonal conditions, it avoids the severe calendar distortions that plague unadjusted monthly figures. It serves as a dependable standard for researchers seeking to evaluate twelve-month automotive price trends free of complex seasonal modeling assumptions.