From ACT Wiki
Jump to: navigation, search


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.


A comparable measure in relation to any set of data.

For example, inflation indices.

See also