The network's live market prices, economic data and other statistics are largely provided by Thomson Reuters (Reuters and Thomson Financial prior to their 2008 merger). Since September 2006, CNBC has operated its own stock market index in conjunction with London's FTSE Group. The FTSE CNBC Global 300 includes the fifteen largest companies from each of the sectors of the Industry Classification Benchmark as well as the thirty largest companies from emerging markets. Calculated continuously from 9 p.m. through to 4:10 p.m. ET each trading day, the index is referenced throughout the network's live programming, particularly on "Worldwide Exchange".