The FIX Protocol (Financial Information eXchange) is a messaging standard used to enable real-time communication between market participants, including brokers, exchanges, and institutional investors. Originally developed for equity markets, FIX has evolved to support a wide range of asset classes, including fixed income, derivatives, and commodities. It is widely used for order routing, trade execution, and post-trade services. The protocol enables secure, fast, and standardized communication, which is particularly important in high-frequency trading and for participants that rely on systematic trading strategies. Efficient use of FIX can reduce latency and enhance the speed of execution, making it a critical tool in the trading infrastructure of institutional investors.