Antitrust rules prohibit agreements between market operators that would restrict competition, and the abuse of dominance.  European Antitrust policy is developed from two central rules set out in the Treaty on the Functioning of the European Union:

1. Article 101 of the Treaty prohibits agreements between two or more independent market operators, which restrict competition.
   The most flagrant example of illegal conduct infringing Article 101 is the creation of a cartel between competitors, which may involve price-fixing and/or market sharing.
    
2. Article 102 of the Treaty prohibits firms that hold a dominant position on a given market to abuse that position, for example by charging unfair prices, by limiting production, or by refusing to innovate to the prejudice of consumers.

> Read full Antitrust & Cartels Overview