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Chicago purchasing management index at highest since January

A worker attaches rivets to an aluminum case lid at the Aluminum Case Company in Chicago, Illinois
Tim Boyle | Bloomberg | Getty Images
A worker attaches rivets to an aluminum case lid at the Aluminum Case Company in Chicago, Illinois

A key reading on manufacturing sector in the Midwest on Friday showed activity hotter than expected in October.

The Chicago Purchasing Management Index came in at 56.2 in October, compared with expectations of 49.0 and the month-earlier reading of 48.7. A reading above 50.0 signifies expansion in the sector.

It was the highest reading since January.