Calculation price indices
The price indices of Wiener Börse AG are continuously calculated during trading hours. The new
index value is calculated by multiplying the initial value by the ratio of the current index
capitalization to the initial capitalization and the current adjustment factor. The purpose of the
adjustment factor is to compensate for changes due to index adjustments (e.g. corporate actions).
Only changes of share prices and exchange rates influence the index value.
Formula for the calculation of indices in local currency:
Formula for the calculation of indices in EUR:
| Symbol | Description |
|---|---|
| N | Number of stocks contained in the index |
| P i | Price of stock i in local currency |
| EUR/LC | Mid-rate of bid and ask currency quotes of the Euro against the respective local currency |
| Q i | Number of shares of stock i in the index |
| FF i | Free float factor of stock i |
| RF i | Representation factor of stock i |
| AF | Adjustment factor |
| t | Time of index calculation |
| t 0 | Index start date |