|
|
|
|
| |
How is an index calculated during the trading day? |
|
|
|
|
|
|
|
|
|
The continuous trading equity indices are calculated every 30 seconds. The following equation describes the calculation process carried out every 30 seconds:
where:
|
n |
- |
The number of shares included in the index population.
|
|
Mt j |
- |
The index on day t at j point in time. |
|
Mt-1 |
- |
The index on the end of day t-1. |
|
Wit |
- |
The weight of share i on day t |
|
Pijt |
- |
Price of share i at j point in time. |
|
Pit |
- |
Base price of share i on day t. |
The index is calculated to an accuracy of two digits after the decimal point.
Back to free float indices FAQ |
|
|
|
|
|
|
|