FTSE All-Share Index

FTSE All-Share
Performance of the FTSE All-Share index from 1980 to 2024
Foundation10 April 1962
OperatorFTSE Russell
ExchangesLondon Stock Exchange
Trading symbol
  • ASX
Constituents563 (May 2024)
TypeLarge-cap
Market cap£2.407 trillion (May 2024)
Weighting methodCapitalisation-weighted
Related indices
Websiteofficial website
Reuters.FTAS
BloombergASX:IND

The FTSE All-Share Index, originally known as the FTSE Actuaries All Share Index, is a capitalisation-weighted index, comprising around 600 of more than 2,000 companies traded on the London Stock Exchange (LSE). By weighting companies based on their market capitalisation, the index ensures that companies with larger market capitalisations have a greater influence on the index's performance.[1] Since 29 December 2017 the constituents of this index totaled 641 companies.[2] The FTSE All-Share is the aggregation of the FTSE 100 Index and the FTSE 250 Index, which are together known as the FTSE 350 Index, and the FTSE SmallCap Index. The index is maintained by FTSE Russell, a subsidiary of the London Stock Exchange Group. It aims to represent at least 98% of the full capital value of all UK companies that qualify as eligible for inclusion.[3]

The index base date is 10 April 1962 with a base level of 100.[4]

  1. ^ "The FTSE All-Share Index for Beginners". everyday investor. Retrieved 2024-02-22.
  2. ^ "FTSE All-Share Indexes". FTSE Russell. Retrieved 22 March 2020.
  3. ^ "FTSE UK Index Series". FTSE Russell. Retrieved 22 March 2020.
  4. ^ "Index base date". Financial Dictionary. Retrieved 22 March 2020.