That's exactly what an Oligopoly is. What are you confused about? MasterCard and Visa form an oligopoly in the Western world. You can also call it a duopoly if you prefer (although Amex is also thriving in its niche).
MKT The ASX can overlook its Telecomm small-caps. Here’s one diversified brand with an international footprint
Week 45 Wrap: Combat sports usher in Trump 2.0 – or is it male insecurity?; RBA boring; Propane suggests China alive
