Chicago PMI Index is based on surveys of purchasing managers in Chicago. This index includes the status of production orders, the prices of manufactured products and inventories in warehouses. Figures below the 45-50 indicate a slowing economy.
The indicator is carefully watched, because it is published shortly before the release of ISM Index. It has a significant impact on the market because it can give an idea of what the ISM Index will be. Growth of the index leads to the growth of the dollar.