How are the indices computed?
Euronext uses a methodology combining liquidity and market capitalisation, as is the case for other stock indices. Following a series of consultations with mid-cap specialists, the indices were tailored to the requirements of users such as asset managers, derivatives trading, etc., particularly as regards capitalisation and liquidity thresholds (minimum degree of liquidity). In addition to free float weighting, the calculation methods respect three key methodological principles: • a nested structure whereby new indices can be created by combining existing ones • a minimum degree of liquidity for the component stocks • a capping factor for tradable index, viz.
