
G17: Seasonal factors for motor vehicle sales have been released
Published on September 30, 2026
The Federal Reserve has re-estimated seasonal factors for motor vehicle sales, using data through April 2026; in the estimation, data for September 2025 and for January 2026 are identified as outliers due to changes in tax policy and a winter storm, respectively. These factors are estimated once per year using X13-ARIMA. The factors will be revised again in the fall of 2027.
A comma-delimited text file containing these seasonal factors is available for download here (CSV).
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