It is information received from surveys of purchasing managers regarding the producing industry in the Chicago area. Chicago Purchasing Managers Index touches the state of manufacturing orders, stored warehouse goods and prices for the goods being manufactured. Readings below 45-50 tell about reduction in economic development. Chicago PMI is carefully followed, as it is published right before ISM Index (NAPM). It has limited online forex market influence and can give a preview of what the ISM Index (NAPM) will be like. An increase value of this index leads to the US dollar rate growth. The data is published on the last business day of each month.