Background

Euronext would like to consult on proposed changes to the rulebook methodology of the OB Benchmark and Mutual Fund Index Family.

Oslo Børs conducts its reviews on a semi-annual basis. For index inclusion into the OSEBX and OSEFX, turnover data from the preceding 12 months is taken into account. The issue arises for newly listed companies, which lack turnover data covering the full Relevant Period. As a result, recent IPOs face a heightened risk of exclusion from the index due to low turnover rankings.

This consultation proposes to address this issue by introducing a measure that extrapolates turnover for recently listed companies with only limited available turnover data.

Current and proposed rules:

Current rule:

Step 3: Selection Ranking 

Eligible Companies are ranked according to 12 months Turnover (EOB) up to and including the Review Cut Off Date. The 12 days with the highest Turnover (EOB) for each security are excluded from the calculation. Companies are also ranked within their ICB Super Sector in accordance with their Free Float Market Capitalization. The ranking includes all Companies from the Index Universe, and thus also includes Companies within the lowest 40% in terms of Turnover (EOB) as well as Companies that have been traded less than 90% of the trading days. 

Proposed rule (changed parts underlined): 

Step 3: Selection Ranking 

Eligible Companies are ranked according to 12 months Turnover (EOB) up to and including the Review Cut Off Date. The 12 days with the highest Turnover (EOB) for each security are excluded from the calculation. Companies are also ranked within their ICB Super Sector in accordance with their Free Float Market Capitalization. The ranking includes all Companies from the Index Universe, and thus also includes Companies within the lowest 40% in terms of Turnover (EOB) as well as Companies that have been traded less than 90% of the trading days. 

If a company’s value of Turnover (EOB) is not available for the entire relevant period, the available value of Turnover will be extrapolated to the entire Relevant Period. In such cases, the value of Turnover during the first twenty days that the company was admitted to listing will be ignored.

Timeline of changes

Stakeholders will have until the 3rd of March 2026 to react to the consultation. The new rules, if validated by Index Design, will be implemented as of the September 2026 Review.

Questions on the proposed changes
Do you agree with the proposed changes to the Index Rulebooks?
Do you agree with the proposal to start extrapolating turnover for newly listed companies that were not listed for the entire Relevant Period?
Do you agree with the proposed timelines?
Please detail any other suggestion you may have
Your details
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