In finance, “FIX” (Financial Information Exchange) refers to an electronic communications protocol used for real-time exchange of information and messages related to securities transactions and markets. It is widely used in the financial industry by traders, brokers, and exchanges to facilitate trade execution and communication of trade-related information such as quotes, orders, and trade confirmations. The FIX protocol provides a standard format for these messages, allowing for interoperability and efficiency in the exchange of information between different systems and parties.