CAC 40
 CAC 40 performance since 1980, linked to "indice Insee de la Bourse de Paris' from 1965 to 1987. | |
| Foundation | 31 December 1987 |
|---|---|
| Operator | Euronext |
| Exchanges | Euronext Paris |
| Trading symbol |
|
| Constituents | 40 |
| Type | Large cap |
| Market cap | €2.670 trillion (26 February 2026) |
| Weighting method | Free-float capitalization-weighted |
| Related indices | CAC Next 20, CAC Small |
| Website | www.euronext.com |
The CAC 40 (French pronunciation: [kak kaʁɑ̃t]) (Cotation Assistée en Continu) is a benchmark French stock market index. The index represents a capitalization-weighted measure of the 40 most significant stocks among the 100 largest market caps on the Euronext Paris (formerly the Paris Bourse). It is a price return index. It is one of the main national indices of the pan-European stock exchange group Euronext alongside Euronext Amsterdam's AEX, Euronext Brussels' BEL20, Euronext Dublin's ISEQ 20, Euronext Lisbon's PSI-20 and the Oslo Bors OBX Index. It is an index without dividends. Cotation operates every working day from 9:00 a.m. to 5:30 p.m. It is updated every 15 seconds.