Data from a key indicator for the economic health in the manufacturing industry has shown a significant slowdown in the growth in the Chicago area. The Chicago Purchasing Managers’ Index (PMI) data showed a reading this month of 52.8 which fell short of the forecasted 54.8. While the numbers still show growth in the sector, the pace has significantly slowed, the data shows. The data is a key indicator monitored by investors for clues about the health of the U.S. manufacturing sector,