Regular adjustments

(at fixed intervals, subject to committee approval)

All periodic adjustments and changes to the index composition are based on a set of rules, are submitted to the Index Committee, and are implemented by the index management team. Further details regarding the periodic adjustments and any changes to the index guidelines are determined by the Index Committee and implemented by the index management team. Further details regarding the periodic adjustments and the Committee’s decisions on any changes to the index guidelines, as well as the effective date of any changes, will be published immediately following the meetings. In the event of extraordinary situations not explicitly described in these rules, the Index Committee may make appropriate decisions while taking into account the interests of the market and the index.

The Index Committee is composed of the following members:

March/June/September/December
Quarterly review of calculation parameters (number of shares, FFF, RF)

March/September: Semi-annual review of the future index composition

Regular adjustments (periodic adjustments):
are always carried out after the close of trading on the last trading day of index derivatives (expiration—usually the third Friday of the month).

Austrian indices

The semi-annual review of the ATX’s index composition is based on the monthly watch list. The watch list ranks the stocks traded on the prime market according to the selection criteria of liquidity (exchange trading volume) and market capitalization of the free float. A stock qualifies for the ATX if it ranks among both the 25 most liquid and the 25 highest-capitalized stocks (measured by free float) on the prime market. Should more than 20 companies meet both criteria, the ranking by trading volume serves as the basis for inclusion in or retention on the ATX. The ATX generally comprises 20 stocks.

For details on the procedures governing the semi-annual review of the composition of the other Austrian indices, please refer to the guidelines for the Austrian indices of Wiener Börse AG.

CEE & CIS indices

The Index Committee makes its decisions regarding index inclusions and exclusions based on the so-called TO/Cap rule. The TO/Cap rule presents, in list form, the current free float market capitalization and revenue performance over the past 12 months for companies eligible for inclusion in an index. To be included in an index, a company must meet the minimum thresholds for revenue and free float market capitalization published in the respective rules and regulations. Existing index constituents that no longer meet these criteria following a semi-annual review are removed from the index. The number of shares, FFF, and RF of index constituents are adjusted, if necessary, during the quarterly review.

For further details, please refer to the guidelines for the CEE & CIS indices of Wiener Börse AG.