1. Securities prices - summary information.
A number showing the variation in price of a group of securities with respect to a chosen base period.
Indices may be calculated as arithmetical or geometric averages and individual components may be weighted, for example by market capitalisation.
For example the FTSE 100 or the S&P 500.
2. Financial data - summaries.
A comparable measure in relation to any set of financial data.
For example, inflation indices or interest rate indices.
3. Data - summaries.
A comparable measure in relation to any set of data.