The FTSE 100 Index, also called FTSE 100, FTSE, or, informally, the “Footsie” , is a share index of the 100 companies listed on the London Stock Exchange with the highest market capitalization. It is one of the most widely-used stock indices and is seen as a gauge of prosperity for businesses regulated by UK company law. The index is maintained by the FTSE Group, a subsidiary of the London Stock Exchange Group. FTSE stands for Financial Times Stock Exchange. The index began on 3 January 1984 at the base level of 1000; the highest closing value reached to date is 6949.63, on 24 February 2015, with the highest intra-day value being 6958.89, on the same day – the previous peak having been over 15 years previously during the dot-com bubble. After falling during the financial crisis of 2007-2010 to below 3500 in March 2009, the index recovered to a peak of 6091.33 on 8 February 2011, fell under the 5000 mark on the morning of 23 September 2011, but reached its record high of 6949.63 on the market close of 24 February 2015 showing an almost doubling in value from the crash in 2008.