FTSE 100 Index \ An index of the share prices of the 100 largest companies (by market capitalisation) in the UK which is updated throughout the trading day in real time. The index was started in 1984 with a base of 1,000. See also FTSE Actuaries All-Share Index.Stock Exchange indices are designed to give investors an idea of the general movement of the stock markets and its overall value. By comparing the performance of their own portfolios with the performance of one of the Stock Exchange indices, investors can see how well they have done from a comparative point of view. In particular they can see whether they would have been better off putting their money in an index tracker fund.The main sub-indices of the FTSE Actuaries All-Share are:FTSE 100: the 100 largest quoted companies in the UKFTSE MID 250: the next largest 250 companiesFTSE A 350: combination of FTSE 100 and FTSE 250FTSE Smallcap: the remaining companies listed in the FTSE Actuaries All-Share indexFTSE A Fledgling: companies too small to qualify for the FTSE All-ShareFTSE AIM: companies trading on the Alternative Investment MarketTechMark: index of companies primarily involved in technologyThe companies in the FTSE Actuaries All-Share Index are also divided into 7 main industrial groupings:Mineral extractionGeneral industrialConsumer goodsServicesUtilitiesFinancialsInvestment trustsThese categories are divided further into 37 subcategories.
FTSE 100 Index / an index of the share prices of the 100 largest companies (by market capitalisation) in the uk which is updated throughout the trading day in real time. the index was started in 1984 with a base of 1,000. see also ftse actuaries all-share index.stock exchange indices are designed to give investors an idea of the general movement of the stock markets and its overall value. by comparing the performance of their own portfolios with the performance of one of the stock exchange indices, investors can see how well they have done from a comparative point of view. in particular they can see whether they would have been better off putting their money in an index tracker fund.the main sub-indices of the ftse actuaries all-share are:ftse 100: the 100 largest quoted companies in the ukftse mid 250: the next largest 250 companiesftse a 350: combination of ftse 100 and ftse 250ftse smallcap: the remaining companies listed in the ftse actuaries all-share indexftse a fledgling: companies too small to qualify for the ftse all-shareftse aim: companies trading on the alternative investment markettechmark: index of companies primarily involved in technologythe companies in the ftse actuaries all-share index are also divided into 7 main industrial groupings:mineral extractiongeneral industrialconsumer goodsservicesutilitiesfinancialsinvestment truststhese categories are divided further into 37 subcategories.