...
However, according to the Commission, market share is only a useful indication. The Commission interprets market shares in the light of relevant market conditions, and in particular of the dynamics of the market and of the extent to which products are differentiated. In other word, market shares do themselves do not in themselves determine whether a firm has a dominant position. As the court in United Brand pointed out, “in general a dominant position derives from a combination of several factors which, taken separately, are not necessarily determinative”.
...
