WBI® - Wiener Börse Index

The index is published by Wiener Börse. It contains all shares listed on the Official Market and the Semi-Official Market. The WBI as overall index reflects movements on the Austrian stock market as a whole.
The WBI has been calculated in its present form since the beginning of the year 1968. This date was chosen as base date because at the time, legislation promoting economic growth ("Wachstumsgesetze") became effective which brought numerous improvements to the capital market.  The WBI has been calculated on a daily basis at every trading session since 2 September 1985.

New listings have been added to the index since 1984. Adjustments are made in cases of changes in the capital of a company (capital increases or reductions) and when new shares are admitted to listing.

• For securities traded in consecutive trading, the closing prices are used, and for those for which only one price is fixed per trading session, the day's prices are used.
• The index is calculated once a day after the closing of the trading session.  It is not updated regularly, but only as the necessity arises.
• If no price or estimated price has been fixed at a trading session, the last available price or estimated price is used for the index calculation.
• Adjustments are not made for price markdowns due to dividend distributions.
• The Paasche formula is used for the calculation of the WBI.
• The index formula guarantees that each individual share price influences the overall index in proportion to the company's listed capital.