The FTSE AIM 100 Index index was introduced on 16th May 2005, and is a market capitalisation weighted stock market index incorporating the largest 100 companies by capitalisation which have their primary listing on the Alternative Investment Market, it may contain companies that are also included in the FTSE AIM UK 50 Index.
The index is reviewed quarterly, and the constituent companies may change based on market capitalisation data as at the end of February, May, August and November.
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