@PunktPunktKommaStrich that the list with the current top 10 that you see on extraetf, for example, is because the values shift with price gains and losses, right? But the companies themselves remain in the index?
The price of each included share is calculated according to its market capitalization, so that larger companies receive a higher percentage in the weighting. The total value of the index is calculated by adding the market capitalization of each share and dividing this sum by the total number of shares.