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The CAC 40 (French: CAC quarante [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 one of the main national indices of the pan-European stock exchange group Euronext alongside Brussels' BEL20, Lisbon's PSI-20 and Amsterdam's AEX.

CAC 40
CAC 40.png
CAC 40 performance between 1964 and 2016
ExchangesEuronext Paris
TypeLarge cap
Market cap1.207 trillion (31 March 2016)[1]
Weighting methodCapitalization-weighted
Related indicesCAC Next 20, CAC Small


The CAC 40 takes its name from the Paris Bourse's early automation system Cotation Assistée en Continu (Continuous Assisted Quotation). Its base value of 1,000 was set on 31 December 1987, equivalent to a market capitalisation of 370,437,433,957.70 French francs.[2] In common with many major world stock markets, its all-time high to date (6922.33 points) was reached at the peak of the dot-com bubble in September 2000.[3] On 1 December 2003, the index's weighting system switched from being dependent on total market capitalisation to free float market cap only, in line with other leading indices.[4]



The CAC 40 index composition is reviewed quarterly by an independent Index Steering Committee (French: Conseil Scientifique).[2] If any changes are made, they are effected a minimum of two weeks after the review meeting.[2] At each review date, the companies listed on Euronext Paris are ranked according to free float market capitalisation and share turnover over the prior 12 months.[5] From the top 100 companies in this ranking, forty are chosen to enter the CAC 40 such that it is "a relevant benchmark for portfolio management" and "a suitable underlying asset for derivatives products".[5] If a company has more than one class of shares traded on the exchange, only the most actively traded of these will be accepted into the index (generally this will be the ordinary share).[5]


The CAC 40 is a capitalization-weighted index. The number of shares issued (used to calculate the market cap and hence the index weight) of a company is reviewed quarterly, on the third Friday of March, June, September and December.[2] Since December 2003, the index weightings of companies in the index have been capped at 15% at each quarterly index review,[5] but these range freely with share price subsequently. A capping factor is used to limit the weights to 15% (if necessary), and is reviewed annually by the Index Steering Committee on the third Friday of September.[5]


The index value I of the CAC 40 index is calculated using the following formula:[5]  with t the day of calculation; N the number of constituent shares in the index (usually 40); Qi,t the number of shares of company i on day t; Fi,t the free float factor of share i; fi,t the capping factor of share i (exactly 1 for all companies not subject to the 15% cap); Ci,t the price of share i on day t; Qi,0 the number of shares of company i on the index base date; Ci,0 the price of equity i on the index base date; and Kt the "adjustment coefficient for base capitalization" on day t (reflecting the switch from the French franc to the Euro in 1999).


Although the CAC 40 is almost exclusively composed of French-domiciled companies, about 45% of its listed shares are owned by foreign investors, more than any other main European index.[6] German, Japanese, American and British investors are amongst the most significant holders of CAC 40 shares. This large percentage is due to the fact that CAC 40 companies are more international, or multinational, than any other European market. CAC 40 companies conduct over two-thirds of their business and employ over two-thirds of their workforce outside France.[7]

Record valuesEdit

Type Date Value
Closing high September 4, 2000 6,922.33
Intraday high September 4, 2000 6,944.77


A Louis Vuitton store in Singapore, part of LVMH group.
Peugeot 508, manufactured by Peugeot part of PSA group.
Alpine A110, manufactured by Alpine part of Renault group.
CFM56 turbofan engine, manufactured by Safran.
Pont de Normandie, built by Bouygues and Vinci, the largest construction company in the world by revenue.

The index consists of the following companies as of the quarterly update effective March 2018.

The most recent composition can be found on euronext website.

Company Sector Ticker
Accor hotels EPA:AC
Air Liquide commodity chemicals EPA:AI
Airbus aerospace EPA:AIR
ArcelorMittal steel AMS:MT
Atos IT services EPA:ATO
AXA full line insurance EPA:CS
BNP Paribas banks EPA:BNP
Bouygues heavy construction EPA:EN
Capgemini IT services EPA:CAP
Carrefour food retailers and wholesalers EPA:CA
Crédit Agricole banks EPA:ACA
Danone food products EPA:BN
Dassault Systèmes software EPA: DSY
Engie gas and electric utility EPA:ENGI
Essilor medical supplies EPA:EL
Hermès clothing and accessories EPA: RMS
Kering retail business EPA:KER
L'Oréal personal products EPA:OR
Legrand electrical components and equipment EPA:LR
LVMH clothing and accessories EPA:MC
Michelin tires EPA:ML
Orange telecommunications EPA:ORA
Pernod Ricard distillers and vintners EPA:RI
PSA automobiles EPA:UG
Publicis media agencies EPA:PUB
Renault automobiles EPA:RNO
Safran aerospace and defence EPA:SAF
Saint-Gobain building materials and fixtures EPA:SGO
Sanofi pharmaceuticals EPA:SAN
Schneider Electric electrical components and equipment EPA:SU
Société Générale banks EPA:GLE
Sodexo food services and facilities management EPA:SW
STMicroelectronics Semiconductors EPA:STM
TechnipFMC Oil and Gas services EPA:FTI
Thales defense EPA:HO
Total integrated oil and gas EPA:FP
Unibail-Rodamco-Westfield real estate investment trusts AMS:URW
Veolia water, waste, transport, energy EPA:VIE
Vinci heavy construction EPA:DG
Vivendi broadcasting and entertainment EPA:VIV

See alsoEdit


  1. ^ "CAC 40 Factsheet" (PDF). Euronext. Retrieved 8 April 2016.
  2. ^ a b c d "CAC 40 index profile". Euronext. Archived from the original on 9 December 2007. Retrieved 3 December 2007.
  3. ^ "Investors celebrate stock market boom". BBC News. 31 December 2003. Retrieved 3 December 2007.
  4. ^ "CAC40 shift to free-float weighting: revision of free-float calculation and capping factors" (Press release). Euronext. 5 November 2003. Retrieved 3 December 2007.
  5. ^ a b c d e f "Rules for the CAC 40 Index" (PDF). Euronext. January 2009. Archived from the original (PDF) on 16 June 2011. Retrieved 17 December 2009.
  6. ^ Chirac, Jacques (24 March 2006). "Press conference given by M. Jacques Chirac, President of the Republic, following the European Council (excerpts)". Archived from the original on 20 June 2010. Retrieved 27 September 2010.
  7. ^ Lagarde, Christine (6 May 2006). ""France and Globalization": Lecture Given by Mme Christine Lagarde, Minister Delegate for Foreign Trade, to The Ecole des Hautes Etudes Commerciales in Lille (excerpts)". Retrieved 3 December 2007.

External linksEdit