The FTSE 100 Index is a major stock market index which tracks the performance of 100 most capitalized companies traded on the London Stock Exchange. FTSE 100 companies represent about 80 percent of the entire market capitalization of the London Stock Exchange. It is a free-float index. The FTSE 100 has a base value of 1000 as of January 3, 1984. This page provides - United Kingdom Stock Market (FTSE 100) - actual values, historical data, forecast, chart, statistics, economic calendar and news. UK FTSE 100 Stock Market Index - actual data, historical chart and calendar of releases - was last updated on September of 2018.