The FTSE AIM All-Share Index was revised from the previous FTSE AIM Index on 16 May 2005, and is a

stock market index In finance, a stock index, or stock market index, is an Index (economics), index that measures the performance of a stock market, or of a subset of a stock market. It helps investors compare current stock price levels with past prices to calcul ...

consisting of all companies quoted on the

Alternative Investment Market AIM (formerly the Alternative Investment Market) is a sub-market of the London Stock Exchange that was launched on 19 June 1995 as a replacement to the previous Unlisted Securities Market, Unlisted Securities Market (USM) that had been in opera ...

which meet the requirements for

liquidity Liquidity is a concept in economics involving the convertibility of assets and obligations. It can include: * Market liquidity In business, economics or investment, market liquidity is a market's feature whereby an individual or firm can quic ...

and

free float In the context of stock markets, the public float or free float represents the portion of Share (finance), shares of a corporation that are in the hands of public investors as opposed to locked-in shares held by promoters, company officers, control ...

. 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. The index is maintained by FTSE Russell, a subsidiary of the London Stock Exchange Group.

References

External links

AIM page on LSE site

FTSE Group website

Bloomberg page for AXX:IND
Economy of the United Kingdom European stock market indices {{stockexchange-stub