FTSE 100 Index

FTSE 100
Performance of the FTSE 100 index between January 1984 and April 2024
Foundation3 January 1984
OperatorFTSE Russell
ExchangesLondon Stock Exchange
Trading symbol
  • UKX
Constituents100 (May 2024)
TypeLarge-cap
Market cap£2.034 trillion (May 2024)
Weighting methodCapitalisation-weighted
Related indices
Websiteofficial website
Reuters.FTSE
BloombergUKX:IND

The Financial Times Stock Exchange 100 Index, also called the FTSE 100 Index, FTSE 100, FTSE, or, informally, the "Footsie" /ˈfʊtsi/, is the United Kingdom's best-known stock market index of the 100 most highly capitalised blue chip companies listed on the London Stock Exchange.[1] Founded in 1984 by Stock Exchange to better reflect activity on the market, it replaced the Financial Times own FT 30.[2] A new index afforded Stock Exchange the opportunity to launch the options contract derived from the FTSE's real-time data while competitors LIFFE launched the futures contract.[3][4] With Margaret Thatcher's sweeping financial deregulation that culminated in the Big Bang the combination of a new index, LIFFE tradable derivatives and promotion by the Financial Times lead to the FTSE 100 becoming the most widely used barometer of whether the UK stock market was rising or falling.[5]

The index consists of 32 sectors, four of which have a market capitalisation exceeding £200 billion as at 3 May 2024. These are pharmaceuticals, oil & gas, metals and mining and banking services, which together account for approximately 47% of the index's market capitalisation.[6] At the same date there were four companies with a market cap exceeding £100 billion: Shell, AstraZeneca, HSBC and Unilever, which together account for approximately 28% of the market cap.[6]

Each calendar quarter, the FTSE's constituents are reviewed and some companies will either exit or enter the index, resulting in irregular trading volume and price changes as market participants rebalance their portfolios.[7]

  1. ^ "FTSE UK Index Series". LSEG. FTSE Russell. Retrieved 27 February 2024.
  2. ^ Michie 1999, pp. 573
  3. ^ Scott, Gordon. "LIFFE". investopedia. Retrieved 12 August 2020.
  4. ^ Kynaston 1997, pp. 131
  5. ^ Michie 1999, pp. 574
  6. ^ a b "FTSE constituents". London Stock Exchange. Retrieved 4 May 2024.
  7. ^ Cite error: The named reference overview was invoked but never defined (see the help page).

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