The Institute for Supply Management manufacturing index for December was revised down to 50.2 from 50.7, while the November index was raised to 49.9 from 49.5.

The December non-manufacturing index was revised to 55.7 from 56.1 and the November was moved to 54.8 from 54.7.

The changes follow the U.S. Department of Commerce's completion of its annual adjustment to the seasonal factors used in the monthly ISM reports.

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