MarketAxess Holdings Inc. operates an electronic trading platform that enables fixed-income market participants to trade corporate bonds and other types of fixed-income instruments using its trading technology. Institutional investor and broker-dealer firms are users of trading platform, accessing global liquidity in the United States corporate bonds, emerging markets and high-yield bonds, European bonds, the United States agency bonds, municipal bonds, credit default swaps and other fixed-income securities. Through Open Trading protocols, it executes trades in certain bonds between and among institutional investor and broker-dealer clients in a trading environment on a matched principal basis. It offers trading-related products and services, including market data to assist clients with trading decisions; connectivity solutions that facilitate straight-through processing; technology services to optimize trading environments, and execution services for exchange-traded fund managers.