The FTSE 100 is traded each trading day on the London Stock Exchange between 10:00 am and 6:30 pm CET the index level is calculated continuously once a second in real time and published every 15 seconds. The composition of the FTSE 100 and the weighting of the shares included in it are reviewed twice annually and adjusted when necessary. For example, the shares must show adequate market capitalization, must be listed in pounds sterling or euros on the London Stock Exchange, and must fulfill additional criteria relating to free float and liquidity.

In order to be included in the FTSE 100, a share must fulfill certain criteria. Dividend payments are not considered when calculating the index. The index level represents the average of the shares included in it. Like the Swiss Market Index (SMI), the FTSE 100 is a price index. For this reason, the FTSE 100 and its performance are also regarded as an indicator for the British share market as a whole.

In total, the companies listed in the FTSE 100 represent around 81 per cent of the entire market capitalization traded on the British share market. The FTSE 100 is the British blue-chip index and consists of the 100 British companies with the highest market capitalization, the growth of which is reflected in the index. INDEX VALUE definition: An index is a system by which changes in the value of something and the rate at which it.