PMI Surveys track sentiment among purchasing managers at manufacturing, construction and/or services firms. An overall sentiment index is generally calculated from the results of queries on production, orders, inventories, employment, prices, etc. This is only a limited sample of PMI headline data displayed on the BLOOMBERG PROFESSIONAL service, under licence from Markit. Full historic PMI data series and other sub-indices are available via BLOOMBERG on subscription to Markit. See www.markit.com for more details.