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The Financial Times Stock Exchange 100 Index, also called the FTSE 100 Index, FTSE 100, FTSE, or, informally, the "Footsie" , is a share index of the 100 companies listed on the London Stock Exchange with the highest market capitalization. It is seen as a gauge of prosperity for businesses regulated by UK company law. The index is maintained by the FTSE Group, a subsidiary of the London Stock Exchange Group. The index began on 3 January 1984 at the base level of 1000; the highest closing value reached to date is 7103.98 (with an intra-day high of 7122.74), on 27 April 2015〔(【引用サイトリンク】title=HSBC gives FTSE 100 renewed boost )〕 - the previous peak having been over 15 years previously during the dot-com bubble.〔(【引用サイトリンク】title=FTSE 100: INDEXFTSE:UKX quotes & news - Google Finance )〕〔(【引用サイトリンク】title=Can FTSE 100 break 7,000 mark? )〕 After falling during the financial crisis of 2007-2010 to below 3500 in March 2009, the index recovered to a peak of 6091.33 on 8 February 2011, fell under the 5000 mark on the morning of 23 September 2011, but reached its record high on the market close of 27 April 2015, more than doubling in value from the crash in 2009. On 24 February 2015 the index had closed at 6943.63 breaking through its previous all-time high of 6930 which had been reached on the last trading day of 1999. == Overview == The index is maintained by the FTSE Group, a now wholly owned subsidiary of the London Stock Exchange which originated as a joint venture between the ''Financial Times'' and the London Stock Exchange. It is calculated in real time and published every 15 seconds when the market is open. The FTSE 100 consists of the largest 100 qualifying UK companies by full market value.〔(Ground Rules for the Management of The UK Series of the FTSE Actuaries Share Indices (section 5) )〕 A large slice of these are international companies, however, so the index's movements are a fairly weak indicator of how the UK economy is faring. A better indication of the UK economy is the FTSE 250 as it contains a smaller proportion of international companies.〔(【引用サイトリンク】title=Which indices best represent the economy? )〕 The constituents of the FTSE are determined quarterly, on the Wednesday after the first Friday of the month in March, June, September and December. The values used to make the changes to the indices are taken at the close of business the night before the review.〔(FTSE UK Quarterly Review )〕 FTSE 100 companies represent about 81% of the entire market capitalisation of the London Stock Exchange. Even though the FTSE All-Share Index is more comprehensive, the FTSE 100 is by far the most widely used UK stock market indicator. Other related indices are the FTSE 250 Index (which includes the next largest 250 companies after the FTSE 100), the FTSE 350 Index (which is the aggregation of the FTSE 100 and 250), FTSE SmallCap Index and FTSE Fledgling Index. The FTSE All-Share aggregates the FTSE 100, FTSE 250 and FTSE SmallCap. Component companies must meet a number of requirements set out by the FTSE Group, including having a full listing on the London Stock Exchange with a Sterling or Euro denominated price on the Stock Exchange Electronic Trading Service, and meeting certain tests on nationality, free float, and liquidity. Continuous trading on the London Stock Exchange starts at 08:00 and ends at 16:30 (when the closing auction starts), and closing values are taken at 16:35. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「FTSE 100 Index」の詳細全文を読む スポンサード リンク
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