Recalculation of seasonal adjustment factors

PPI Detailed Report, Jan, 2005

Effective with this report, seasonal adjustment factors have been recalculated to reflect price-movement patterns during 2004 for stage-of-processing (SOP) and commodity-grouping indexes. This routine annual recalculation may affect previously published seasonally adjusted indexes and percent changes for January 2000 through December 2004. Revised seasonally adjusted data for this period, along with seasonal factors for commodity indexes to be used through December 2005, were released February 16, 2005. To request this information, contact the Division of Industrial Prices and Price Indexes, Section of Index Analysis and Public Information, at ppi-info@bls.gov or (202) 691-7705.

The table below provides monthly seasonally adjusted percent changes for the three major SOP categories during 2004, based on former and recalculated seasonal factors. These percent changes include final price data through August 2004 and may differ from values shown in tables A and B of this report, which include final price data through September 2004.

Over-the-month percent changes in major stage-of-processing indexes,
seasonally adjusted, using former and recalculated seasonal factors
for 2004

                Finished goods        Intermediate goods

Month       Former   Recalculated   Former   Recalculated

January      0.6         0.3         0.9         0.7
February      .1         -.1         1.0          .9
March         .6          .5          .8          .7
April         .7          .7         1.4         1.4
May           .6          .6         1.0         1.0
June         -.2         -.1          .5          .4
July          .0          .1          .5          .6
August        .0          .1         1.1         1.0
September     .1          .2          .2          .4
October      1.7         1.4          .9          .8
November      .5          .7          .8          .9
December     -.7         -.3         -.3         -.1

               Crude goods

Month       Former   Recalculated

January       4.1         4.6
February      1.5          .9
March         1.6         1.7
April         1.8         1.7
May           3.2         3.3
June           .7          .8
July          -.4          .1
August        -.1         -.3
September    -5.1        -4.9
October       4.3         4.2
November      8.7         8.4
December     -2.9        -3.0