(Vienna) Today, the ATX committee reviewed the calculation parameters for Austrian indices according to its index rules. The changes will become effective on 19 June 2017. The next orderly review of the ATX composition is scheduled for 5 September 2017.
For the cellulose fiber manufacturer Lenzing AG the free float factor increases from 0.4 to 0.5 due to the notification of the sale of B&C group's stake. As one of the investors dropped below the reporting threshold, the free float factor for voestalpine AG increases from 0.6 to 0.7. The free float factor of the biotech company Valneva SE decreases from 0.8 to 0.7 due to the acquisition of a stake by an institutional investor. The free float factor represents the portion of a company’s shares that are in the hands of a multitude of public investors and tradable on the stock exchange. It also impacts the weighting of a stock in an index.
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.
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Decisions of the ATX committee from 6 June 2017 (pdf-file 35 KB)
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