Calculation of WBI
The index constituents of WBI are weighted by their market capitalization. The index formula
guarantees that each individual share price influences the overall index in proportion to the
company's listed capital. Wiener Börse uses this formula only for the calculation of the WBI.
| Symbol | Description |
|---|---|
| WBI t | Value of WBI at time t |
| P i,t | Price of i-th stock at time t and t-0 resp. |
| Q i,t | Number of shares issued on stock i at time t |
| N | Number of stocks contained in the index |
| Basis | Deliverable shares of the i-th stock at time t multiplied by price at t-0 |