# Mastercard **Mastercard** is the second-largest U.S. payment-card network and, with [[Visa Inc]], half of the card duopoly. It is a co-defendant in the two-decade merchant class action over interchange ("swipe") fees, whose roughly $38 billion settlement won preliminary approval in June 2026, and a target of the [[Credit Card Competition Act]]. ## See Also - [[Visa Inc]] · [[Credit Card Competition Act]] · [[Fintech Sector]] · [[Antitrust]]