The PMI is produced by Markit Economics and is based on original survey data collected from a representative panel of 750 companies based in the French manufacturing and service sectors. The flash estimate is based on around 85 percent of total PMI survey responses each month and is designed to provide an accurate advance indication of the final PMI data.
Investors need to keep their fingers on the pulse of the economy because it dictates how various types of investments will perform. By tracking economic data such as the purchasing managers' manufacturing indexes, investors will know what the economic backdrop is for the various markets. The stock market likes to see healthy economic growth because that translates to higher corporate profits. The bond market prefers less rapid growth and is extremely sensitive to whether the economy is growing too quickly and causing potential inflationary pressures.