CRAM and Rheinzink v Commission

 Two companies, French and German. Supplied zinc products to a belgian company. Under terms of contract Belgian company could only use products for export, not resell products in common market. What happened: Belgian company started selling products in Germany, undercutting prices of German company. At that moment, both suppliers, German and French stopped delivering supplies. Court: there was perfectly rational reason of parallel behaviour.

Held: If rational explanation for parallel behavior, then it's okay.