DAX
DAX (formerly Deutscher Aktienindex) is a stock market index that measures the performance of 40 of the largest and most liquid companies listed on the Frankfurt Stock Exchange. Introduced on 1 July 1988 with a base value of 1,000 points, the DAX serves as the principal benchmark of the German equity market and is one of Europe's leading stock market indices. The index is administered by STOXX Ltd. on behalf of Deutsche Börse and is calculated using a free-float market capitalization-weighted methodology. Unlike many other major equity indices, the standard DAX is a performance index that assumes dividends are reinvested into the index, although a separate price index is also published.
History
The DAX was introduced on 1 July 1988 by the Frankfurt Stock Exchange and Deutsche Börse to provide a standardized measure of the performance of Germany's largest publicly traded companies. It succeeded earlier German stock market indicators that had been used by financial institutions and the stock exchange.
Initially comprising 30 constituent companies, the DAX became the primary benchmark for the German equity market during the country's economic expansion following German reunification. In September 2021, the number of constituent companies was increased from 30 to 40 as part of broader reforms intended to improve market representation and strengthen listing requirements following the collapse of Wirecard.
Over time, the DAX has become one of the most closely monitored stock market indices in Europe and serves as a benchmark for numerous investment products.
Methodology
The DAX is calculated using a free-float market capitalization-weighted methodology.
Under this methodology:
- constituent companies are weighted according to their free-float market capitalization;
- only shares available for public trading are included in the calculation;
- strategic shareholdings held by governments, founders, or controlling shareholders are generally excluded;
- constituent weights are adjusted periodically to reflect changes in market value and free float.
The standard DAX is calculated as a total return (performance) index, meaning that dividends paid by constituent companies are assumed to be reinvested.
Composition
The DAX consists of 40 companies listed on the Prime Standard segment of the Frankfurt Stock Exchange.
Selection criteria include:
- free-float market capitalization
- trading volume
- liquidity
- continuous listing requirements
- financial reporting standards
The index represents companies across numerous sectors, including:
- automotive manufacturing
- industrial engineering
- chemicals
- pharmaceuticals
- financial services
- insurance
- software
- telecommunications
- consumer goods
- aerospace
- healthcare
- logistics
Many constituent companies derive a significant proportion of their revenues from international markets.
Calculation
The DAX is calculated by aggregating the free-float-adjusted market capitalization of its constituent companies.
The calculation involves:
- determining each constituent's free-float market capitalization;
- applying weighting adjustments where appropriate;
- aggregating constituent values;
- dividing by an index divisor.
The divisor is adjusted to maintain continuity following:
- stock splits
- bonus issues
- rights issues
- mergers
- acquisitions
- spin-offs
- constituent changes
Separate calculations are published for both the performance index and the price index.
Governance
The DAX is administered by STOXX Ltd. under the supervision of Deutsche Börse.
The composition of the index is reviewed regularly according to published rules concerning:
- market capitalization
- trading liquidity
- free float
- financial reporting
- corporate governance
- listing eligibility
Companies may be added or removed during scheduled reviews or following significant corporate events.
Relationship with other German indices
The DAX forms part of a broader family of German equity indices.
Related indices include:
Together, these indices provide coverage of companies across different market capitalizations and industry sectors within Germany.
Applications
The DAX serves as a benchmark for numerous financial products and investment strategies.
Its principal applications include:
- measuring German equity market performance
- benchmarking investment portfolios
- index funds
- exchange-traded funds
- futures trading
- options trading
- passive investment
- financial research
- economic analysis
Many domestic and international investors use the DAX as a reference for investment in German equities.
Impact
The DAX is regarded as the principal indicator of the German stock market and one of Europe's most important equity benchmarks. Because many constituent companies are multinational corporations with substantial international operations, the index reflects both developments within the German economy and broader global economic conditions. It plays a significant role in portfolio management, passive investing, derivatives trading, and financial analysis, and serves as a widely recognized measure of investor sentiment toward Germany's corporate sector and capital markets.