UK100 PROFILE
The Financial Times Stock Exchange 100 Index, also called the FTSE 100 Index, FTSE 100, FTSE, or, informally, the “Footsie”, is a share index of the 100 companies listed on the London Stock Exchange with (in principle) the highest market capitalisation. The index is maintained by the FTSE Group, a subsidiary of the London Stock Exchange Group.
The FTSE 100 Index was launched on 3 January 1984. The market capitalisation weighted FTSE 100 index replaced the price-weighted FT30 Index as the performance benchmark for most investors.