Other NYSE sources of revenues include clearing fees, market data, listing fees and technology services.

FORBES: Stock Exchanges Ain't What They Used To Be

Just imagine if this extraordinary flood of software development talent could be deployed in the decentralized digital currency space where it would lead to reduced transactional friction, shorter clearing times, massively lower processing fees, optional buyer anonymity, and finality of merchant payment.

FORBES: Payments Startup Balanced Innovates In Wrong Direction

While total Fed earnings include fees for services like check clearing and wire transfers provided to depository institutions, the bulk of the earnings come from interest on loans and securities acquired as a by-product of its monetary policy.

FORBES: Big Fed Profits Are Another Benefit Of Wise Balance-Sheet Expansion

Visa earns revenues by charging fees for its transaction processing service, which involves routing payment information to facilitate the authorization, clearing and settlement of transactions.

FORBES: When Visa Hits $92, Don't Say We Didn't Tell You It Was Going There