Markit’s U.S. flash manufacturing PMI unexpectedly fell to 52.8 from August’s 53.1 reading. Economists were looking for a rise to 54.0.

Any figure above 50 indicates expansion, so the September number suggests that the pace of growth in American manufacturing is decelerating this month.

The output sub-index rose to 55.3 from 52.5, but the new orders sub-index fell to 52.7 from 55.7.

A full breakdown of the sub-indices is at right.

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