FIX-3.5-35 is the thirty-fifth release of one of the versions of the FIX Protocol, a protocol developed by the Financial Information eXchange (FIX) Protocol organization. This version, 3.5-35, was released in December of 2017 and includes enhancements to the existing FIX Protocol specification, while also adding additional fields, messages, and components required by certain segments of the financial industry. FIX-3.5-35 is designed to help improve the reliability and accuracy of information exchanges in financial applications. This version allows for more detailed information to be exchanged between buyers and sellers, consolidates certain types of messages, and adds support for real-time market data dissemination.