A purchasing managers index (PMI) is an economic indicator based on government reports undertaken by industrial companies. The index surveys product managers, who are in charge of purchasing the materials needed to create a firm's products. PMIs are used by investors to get a sense of what purchasing managers think of their sector's future. A PMI can affect market sentiment and act as the basis for trading decisions.

It is an economic indicator that is determined from month to month studies of purchasing managers and supply leaders from explicit organizations. PMI manufacturing gives a sign of the economic strength of the manufacturing area.