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Tomorrow’s CPI Seasonal Adjustment Revisions

  • Tomorrow sees the annual recalculation of seasonal adjustment factors and their resulting seasonally adjusted indexes for the CPI basket through Jan’18-Dec’22.
  • There’s obviously no guarantee of the same pattern this time but looking at last year’s recalculation for perspective, the latest three months of core inflation were unrevised on a rounded basis although the two months prior were revised a tenth higher in M/M – see table using values provided by Bloomberg.
  • Timing: CPI can be contacted after 8:30am EST on the day of release to obtain updated seasonal factors.
  • BLS notice on the matter:

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