The document provides an overview of the FIX (Financial Information eXchange) protocol, including: 1) FIX is a messaging standard used for real-time electronic exchange of securities transaction data between institutional investors, broker-dealers, exchanges, and other financial services organizations. 2) It is used to distribute market data, send orders, receive trade confirmations, and more. 3) The protocol is governed by FIX Protocol, Ltd and supports various financial instruments and regions worldwide.