Vienna Stock Exchange News

Austrian Traded Index (ATX) & ATX Prime: New free float factors for BAWAG Group AG and Marinomed Biotech AG

(Vienna) The Vienna Stock Exchange announces new free float factors for Austrian indices (in particular the Austrian benchmark index ATX), following the quarterly review of the calculation parameters. The free float factor of BAWAG Group AG rises from 0.5 to 0.7, following Cerberus' sale of a large block of shares. At Marinomed Biotech AG, the free float factor will rise from 0.4 to 0.5. The free float factor expresses how many shares of a company are distributed among the public and influences how strongly a share is weighted in the index. The French biotech company Valneva SE will be removed from the ATX Prime Index after 20 December 2019. Valneva shares are expected to be tradable in the international segment global market in the future. The changes of the free float factors will take effect on 23 December 2019. The next scheduled review of the composition of the ATX will take place on 3 March 2020.

The calculation of the ATX is based on a purely quantitative procedure. According to "The Rules for the Austrian Indices of the Vienna Stock Exchange", the inclusion or exclusion of stocks from the Austrian indices is reviewed twice a year (March and September). Decisions on new additions to the index are based on average daily trading volumes and the free float capitalization of companies. The Vienna Stock Exchange reviews the calculation parameters (number of shares, free float factors, representation factors) of the index on a quarterly basis. Once a month, the ATX watchlist is published. Representatives of institutional investors, financial institutions that issue financial products on the indices, trading members of the Vienna Stock Exchange, academics advisors and the Vienna Stock Exchange contribute their know-how to the Index Committee, which approves the index rules. A list of the Committee members is available online.


For further information, please contact:

Julia Resch

Julia Resch

T +43 1 531 65-186

Maria Zorn

Maria Zorn

T +43 1 531 65-110

About the Vienna Stock Exchange

The Vienna Stock Exchange is the only securities exchange in Austria. It features a modern infrastructure and supplies market data and relevant information.  It offers Austrian companies maximum visibility, high liquidity and utmost transparency. Investors can rely on the smooth and efficient execution of exchange trades. The Vienna Stock Exchange operates a central market datafeed for Central and Eastern Europe (CEE) and is well established as an expert for the calculation of indices with a reference to the region. Wiener Börse AG, together with its holding company, CEESEG, cooperates with over ten exchanges in CEE and is globally recognized for this unique know-how.

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ATX Total Return in EUR
Austrian Traded Index in EUR