Index consultations

Euronext Indices is committed to provide indices that respond to the best of its abilty to the needs of all stakeholders of its indices. In order to achieve this and in response to developments on the markets frequent feedback is sought among the known users of the indices. For major changes Euronext Indices will launch consultations from time to time via this page.

Each consultation will be open for at least 3 weeks.

A summary of the comments received will be published within 3 weeks after the consultation is closed. In principle the comments will be made public anonymously, indicating only the nature of person or institution providing the comment.

Taking into account the feedback received in the consultation, the Administrator will formulate a proposal for a rule change to the appropriate oversight committee for approval. As a rule such decision will be taken within 3 months after the decision.

Consultation BEL 20 Index Methodology

Euronext would like to consult on proposed changes to the BEL 20 Index rulebook methodology.

To qualify for selection, an eligible company's free float market capitalisation must exceed the thresholds set out in the rulebook. Currently, the thresholds for the BEL 20 are 300,000 and 200,000 multiplied by the BEL-level on the cut-off date for new and existing constituents respectively.

Recent developments indicate that the rising BEL 20 level is resulting in fewer companies qualifying for inclusion, with the risk that the number may fall below 20.

This consultation proposes to address the issue by lowering both thresholds, thereby enabling a larger number of companies to qualify for entry into the index.

Stakeholders will have until the 7^th of April 2026 to react to the consultation. The new rules, if validated by Index Design, will be implemented before the September 2026 Review.

Visit Consultation BEL 20 Index Methodology consultation