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FTSE publishes comprehensive index rules and calculation methodology to support all indices. They are maintained by FTSE Committees and any changes are widely publicised.
Index rules should be read in conjunction with supporting FTSE notices (please click here ). These notices advise of advance changes in index methodology, which may not be reflected in index rules until the change effective date. The notices may also communicate revisions in index treatment in the period up to a rule change.
By using these index rules, you can predict how FTSE will deal with corporate actions and other changes to indices. This ensures FTSE indices are transparent and keeps down the cost of managing funds and products based on them.