If the government forces the card giant to reduce control over security gateways, firms that sell debit processing and adjacent payment tools to banks such as FIS and Fiserv could cash in.

The Department of Justice (DOJ) filed an antitrust lawsuit against Visa. The lawsuit alleges that the financial firm holds a monopoly over debit network markets allowing it to charge banks and markets with exorbitant fees that get passed onto consumers and keep rival companies like PayPal and Square from competing on their level.