What is the CAC 40? Comprehensive Guide for Investors in 2025
The CAC 40 is the benchmark stock market index in France, recognized internationally as a barometer of the country's and Europe’s economy. Composed of the 40 largest French companies listed on Euronext Paris, it reflects the performance of major sectors and attracts investors, analysts, and portfolio managers. In this exhaustive guide of 2025, discover the precise definition of the CAC 40, its composition, its calculation methodology, selection criteria, historical evolution, prospects for the year, as well as all strategies for effectively investing in this index.
Definition and Operation of the CAC 40
The CAC 40 (for "Continuous Assisted Quotation") was created in 1987 by the Paris Stock Exchange to provide a representative index of the French economy. It is calculated in real-time on trading days based on the 40 largest French companies, selected according to their market capitalization and liquidity of their shares. Its value fluctuates continuously from 9:00 to 17:35, Monday through Friday, under the auspices of Euronext Paris.
Select Criteria for Companies
Every quarter, the Scientific Council of Indices at Euronext examines the composition of the CAC 40. This selection is based on two major criteria:
- Floating Market Capitalization: Only freely negotiable shares on the market are taken into account; the Council prioritizes companies with the highest floating market capitalization value.
- Volume of Transactions: The companies retained must present the highest volume of transactions over the last twelve months.
In addition, the Council ensures a coherent sectoral representation and does not give any weight greater than 15% to a single company during each revision.
Historical Evolution of the CAC 40
Launched on December 31, 1987, with a base of 1,000 points, the CAC 40 gradually replaced the old indices (such as that of the 30 leading values) to integrate a greater sectoral diversity and be more representative of the French economic fabric.
Over the decades, the CAC 40 has evolved to include companies from new sectors such as biotechnology, services, engineering, or digital technology. Its composition undergoes regular revisions that reflect the dynamism of the Paris stock exchange and the national economy.
Detailed Composition of the CAC 40 in 2025
The list of companies in the CAC 40 changes with the performance of the stock market, mergers, acquisitions, or exits, and always includes forty of the most influential companies in France. Here is the official composition of the index on November 11, 2025:
- Accor
- Air Liquide
- Airbus
- Alstom
- ArcelorMittal
- AXA
- Bouygues
- Bureau Veritas
- Capgemini
- Carrefour
- Credit Agricole
- Danone
- Dassault Systemes
- Dassault Aviation
- Engie
- EssilorLuxottica
- Eurofins Scientific
- Hermes International
- Kering
- Legrand
- L'Oreal
- LVMH
- Michelin
- Orange
- Pernod Ricard
- Peugeot (Stellantis)
- Publicis Groupe
- Renault
- Safran
- Saint-Gobain
- Sanofi
- Schneider Electric
- Societe Generale
- Sodexo
- STMicroelectronics
- Teleperformance
- Thales
- TotalEnergies
- Unibail-Rodamco-Westfield
- Veolia
- Vinci
This selection reflects the diversity and strength of French economic actors, from luxury to industry, passing through finance, energy, construction, pharmaceuticals, telecommunications, or retail.
Weighted Sectoral Composition and Profiles of CAC 40 Companies
The sectoral composition of the index at the beginning of 2025 illustrates the dominance of certain sectors:
- Industry : 30.7% (Schneider Electric, Airbus, Vinci, Safran, Saint-Gobain...)
- Discretionary Consumer Goods : 21.1% (LVMH, Hermes, Kering, L'Oreal, Michelin, etc.)
- Finance : 12.1% (BNP Paribas, AXA, Societe Generale, Credit Agricole)
- Healthcare : 10.2% (Sanofi, EssilorLuxottica, Eurofins Scientific)
- Energy : 6.9% (TotalEnergies primarily)
- Diverse : telecommunications, technology, real estate, services, etc.
The CAC 40 thus offers exposure to several drivers of the national economy. It has a strong presence in the industrial and luxury sectors, which distinguishes it from Anglo-Saxon indices that are more focused on technology or finance.
Historical Performance of the CAC 40
Evolution of Prices and Recent Records
Since its creation, the CAC 40 has experienced cycles of growth and decline, according to the French and international economic situation. In spring 2021, it exceeded the 7000-point mark for the first time. Between 2023 and November 2025, the index rose by about 12% over two years, illustrating the resilience and growth of large French companies despite a sometimes tense global geopolitical context.
The historical record of the CAC 40 was reached on May 15, 2025, with a close at 8384 points, a level above the symbolic threshold of 8000 points first crossed in February 2024.
Ranking of the Largest Companies in the CAC 40
The weight of companies in the index is expressed as a percentage, reflecting their relative importance. In the ranking of September 2025, Schneider Electric holds the top position, closely followed by TotalEnergies, LVMH, Airbus, and Air Liquide. Hermès, already the world's leading luxury brand, has the highest market capitalization in fashion, surpassing 220 billion euros in autumn 2025. The companies in the CAC 40 have market capitalizations ranging from several tens to several hundreds of billions of euros.
Sectoral Analysis and Dynamics of the CAC 40
One of the major characteristics of the CAC 40 in 2025 is the importance of the industrial sector, but also the share of luxury goods, unique at this level in Europe. The main drivers are:
- Industry (Schneider Electric, Airbus, Safran, Vinci, Saint-Gobain, Bouygues, Legrand, Thales, Bureau Veritas)
- Luxury and Consumer Goods (LVMH, Hermès, Kering, L'Oréal, Pernod Ricard, Michelin)
- Financial Services (BNP Paribas, AXA, Société Générale, Crédit Agricole)
- Healthcare (Sanofi, EssilorLuxottica, Eurofins Scientific)
- Energy (TotalEnergies)
- Technology Sector (Dassault Systèmes, Capgemini, STMicroelectronics, Teleperformance)
This sectoral diversification protects the index from shocks affecting a single sector and offers different opportunities depending on the global economic cycle.
Growth Rates of Key Sectors
Growth has been particularly strong in the luxury sector (LVMH, Hermès, and Kering), driven by international demand and innovation. Industrial values benefited from the energy transition and large infrastructure plans, while healthcare remains a stable pillar in the post-pandemic context.
Influencing Factors on the CAC 40
The CAC 40 fluctuates according to many parameters:
- The global economic situation : economic expansions or recessions, policies of major central banks such as the ECB or the Fed, inflation, interest rates.
- The evolution of currencies : a strong or weak euro impacts the competitiveness of the exporting groups of the CAC 40.
- Geopolitical tensions : conflicts or international sanctions, political instability in certain regions influence the stock market climate.
- Sectoral factors : innovations, commodity price cycles (oil, metals), regulatory or fiscal changes.
- Quarterly financial results : announcements of profits, dividends, growth prospects.
These elements explain the short-term volatility of the index, while offering informed investors opportunities for adjustment and diversification.
How to Invest in the CAC 40 in 2025?
1. Passive Investment via ETFs or FCPs
The simplest method to gain exposure to the CAC 40 is to acquire exchange-traded funds (ETFs) or mutual funds that replicate the index’s performance. In 2025, several CAC 40 ETFs are continuously listed on Euronext Paris, offering:
- Immediate diversification across the 40 companies comprising the index
- Low management fees
- Simplicity of subscription and management suitable for both individual and institutional investors
- The ability to invest through a PEA, securities account, or life insurance policy
2. Selective Investment via Individual Stocks
For investors aiming to outperform the index, a selection of direct stock investments is possible. This involves identifying CAC 40 companies that exhibit:
- Superior profitability compared to the average (e.g., consistent profit growth over five years, high margins, return on equity > 15%)
- An attractive and regular dividend (L’Oréal, Sanofi, TotalEnergies, Vinci offering high yields in 2025)
- Global sectoral leadership (LVMH, Hermès, Schneider Electric, Airbus, Dassault, Safran, Capgemini)
- Balance sheet strength (low debt, recurring cash flow)
This type of investment requires close monitoring of corporate results, macroeconomic news, and sectoral cycles.
3. Active Risk Management and Diversification
No matter the chosen investment approach, rigorous risk management is essential. Best practices include:
- Sectoral diversification: avoiding more than 25% of the portfolio being exposed to a single sector
- Regular rebalancing of the portfolio: partial sale of the most successful holdings, strengthening underperforming stocks with good prospects
- Setting maximum loss thresholds (stop-loss) to protect against volatility
When investing in the CAC 40, it is recommended to prioritize a long-term horizon and stay informed continuously to adjust choices according to economic and regulatory changes.
Perspectives of the CAC 40 in 2025 and Beyond
In 2025, the overall momentum remains positive with analysts anticipating an annual increase of around 8% for the entire index, driven by luxury, technology, service sectors, and a global rebound in industrial demand. Companies sensitive to Asia, particularly Hermès, LVMH, and the aerospace sector with Airbus and Safran, continue to benefit from international recovery.
The CAC 40 retains its appeal for international investors due to the robustness of listed groups, their global reach, and their capacity to distribute stable dividends. Its composition now includes leading companies in tech, innovative materials, and high-value-added services, ensuring greater diversification and resilience against economic uncertainties.
Innovation and Economic Transition
The CAC 40 also evolves in line with major economic transformations:
- Digitalization of businesses and growth of the technology sector (Dassault Systèmes, Capgemini, STMicroelectronics)
- Green revolution and energy transition, added value for Vinci, TotalEnergies and Saint-Gobain
- Growth of artificial intelligence and cloud solutions
- Increasing deployment of sustainable mobility solutions (Renault, Stellantis, Michelin)
These levers allow the index to remain competitive against its American counterparts (S&P 500) or German ones (DAX 40), while affirming itself as a showcase of French economic excellence.
FAQ – Frequently Asked Questions about the CAC 40
How is the value of the CAC 40 calculated?
The value of the index results from the floating market capitalization of each company multiplied by its current price and adjusted for sectoral weightings and market operations. It therefore reflects the aggregated performance of the largest French companies at a given point in time on the market.
How often is the composition of the CAC 40 revised?
The composition of the index is reviewed every quarter, with a major annual revision in September and the possibility of adjustments during structural changes. Entries and exits are made based on the floating market capitalization and trading volume of the stocks.
Can one invest in the CAC 40 through a PEA?
Yes, most CAC 40 ETFs eligible for the PEA (Plan d’Épargne en Actions) allow you to benefit from the tax advantages dedicated to European equity investments, while benefiting from automatic diversification across 40 large companies.
Does the CAC 40 distribute dividends?
The CAC 40 « GR » (Gross Return) index includes the yield of dividends distributed by its companies. Current ETFs often offer both "capitalization" (automatic reinvestment of dividends) and "distribution" (direct payment) versions.
What is the best time to invest in the CAC 40?
Historically, a regular investment strategy over the long term reduces the impact of unfavorable market cycles. Therefore, it is ideal to invest monthly or quarterly rather than in one lump sum, in order to smooth out purchase prices.
Which investor profiles are suitable for the CAC 40?
The CAC 40 appeals to beginners thanks to the simplicity and diversification of ETFs, as well as to seasoned investors capable of individually selecting high-growth or yield potential values.
Conclusion – The CAC 40: An Indispensable Pillar of the European Financial Landscape
In 2025, the CAC 40 remains more than ever a central index for understanding the French economy, investing in the stock market, and capturing the growth of national large companies. It combines tradition and modernity, stability and dynamism, allowing broad exposure to the economic fabric of France while benefiting from the global reach of its members.
Although subject to market fluctuations, the CAC 40 retains its relevance and adapts continuously, offering investors a solid and diversified foundation to grow their wealth in the financial markets.
How to get started with the CAC 40 in 2025?
To invest in the CAC 40, it is sufficient to open a brokerage account or a PEA with a financial institution (bank, broker, online platform), choose an appropriate investment product (ETF, direct stocks, mutual funds), and start building your portfolio. It is recommended to:
- Define your investment objectives (growth, yield, diversification, investment horizon)
- Stay informed regularly about the news of CAC 40 companies and market evolution
- Monitor and rebalance your portfolio according to economic cycles and performance
- Manage risks by diversifying sufficiently and setting loss limits
- Acquire and maintain a solid financial education to make the best decisions
The CAC 40 constitutes a stable and evolving foundation for any investor wishing to invigorate their savings and bet on the excellence of major French companies.