Purchasing Managers’ Indices (PMIs), produced by Markit, have become the key benchmark indicators for measuring growth in any given economy. By surveying more than 20 000 companies in over 30 countries around the world, every month, the PMIs represent the most comprehensive global economic survey available to professional investors. There are two parts to the monthly PMI release; the first is the headline PMI number – designed to provide a snapshot of the health of the economy; the second is the sub-indices, or component level data. These sub-indices provide unrivalled early insight into key economic drivers such as inflation, exports, employment and inventories. PMI data is also available by ICB sector classification, meaning PMI data relating to sector performance can be linked to other stock market-based datasets.