G17: Seasonal factors for motor vehicle sales have been released

Published on September 26, 2025

The Federal Reserve has re-estimated seasonal factors for motor vehicle sales,using data through April 2025; in the estimation, data for December 2024, January 2025, and March-April 2025 are identified as outliers. These factors are estimated once per year using X13-ARIMA. The factors will be revised again in the fall of 2026.

A comma-delimited text file containing these seasonal factors is available for download here (CSV).

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