Liquidity
All FTSE equity indices are designed to ensure sufficient liquidity in their underlying stocks, to match the requirements of each index's users. Each index series has a specific liquidity rule applied in order to increase the tradabil-ity of the indices by removing companies that are difficult to buy and sell, thereby encouraging narrower spreads and lowering costs.
To Enter An Index
A company must have a minimum percentage turnover (this percentage is index specific) of its free-float adjusted shares in issue in at least ten of the twelve months prior to the index review.
To Remain Within An Index
A company must have a minimum percentage turnover (this percentage is index specific) of its free-float adjusted shares in issue in at least eight of the twelve months prior to the index review.
Reviews are carried out on an annual basis. For detailed and index specific liquidity rules information please visit the index rules page for the relevant index.