The FTSE 100 Index (UKX) lists the performance of 100 key stocks listed on the London Stock Exchange. The FTSE 100 is a key indicator of United Kingdom economic performance. It is a weighted index, with the market capitalization of companies determining the weight which their shares carry in the index.
Originally published as the Financial Times Stock Exchange index, the FTSE 100 is now published by FTSE Russell, a subsidiary of the London Stock Exchange Group (LSEG) which operates the London Stock Exchange.
In addition to the FTSE 100, FTSE Russel also publishes a number of other indexes. These include the FTSE 100 Total Return Index which measures the total return of the FTSE 100, the FTSE 100 Net of Tax Index (UKXNUK) which accounts for tax adjustments, the FTSE 250 index which tracks the performance of 250 mid-cap companies which are not included in the FTSE 100, the FTSE All-Share Index which tracks the combined performances of the FTSE 100, FTSE 250 and FTSE Small Cap indexes.
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