doc__table__153

| 113. | As a general rule, the Commission relies on market shares computed over 1 year reference periods. The Commission usually collects such data for at least 3 years, or, in the context of enforcement of the antitrust rules, generally for periods corresponding to the duration of the investigated conduct. However, the reference period over which market shares are computed may differ from the standard 1 year period depending on the characteristics of the relevant market. In particular, in markets characterised by lumpy or irregular demand, or seasonality of supply and/or demand, or in markets undergoing structural change, it may be appropriate to compute market shares over longer or shorter reference periods (164). In markets undergoing structural transitions, such as regulatory or technological changes, or where a forward-looking assessment may be appropriate to capture the market dynamics, market shares may be estimated for the future to reflect those expected changes (165).

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Source: EUR-Lex (Cellar) · retrieved 2026-09-07 · Text as adopted (Official Journal); later amendments are not incorporated in this text.