Major changes in FIX 4.0 include enhancements in the following areas:

  • Session layer
  • Header information
  • Supported encryption
  • Date fields were modified
  • Allocation support was significantly improved

Documents

Icon

FIX 4.0 - FIX 5.0 SP2 Basic and Unified Repository 2.54 MB 1922 downloads May 7, 2014

FIX Basic and Unified Repository files for versions FIX 4.0 - FIX 5.0 SP2 (up to EP97) Revised April 2, 2020 for FIXT-4 (enumeration of session level messages corrected). ...
Download
Icon

FIX 4.0 Specification Documents - MS Word 73.38 KB 184 downloads July 30, 2017

Specification Document and Release Notes (ZIP of MS Word) ...
Download
Icon

FIX 4.0 Specification Release Notes 55.98 KB 271 downloads July 30, 2017

FIX 4.0 Overview ...
Download
Icon

FIX 4.0 Specification Documents - PDF 486.71 KB 688 downloads July 30, 2017

Specification Document and Release Notes (ZIP of PDF) ...
Download
Icon

FIX 4.0 - FIXimate for offline use 41.31 KB 523 downloads July 30, 2017

Download the FIXimate web browser-based cross-referencing tool for the FIX Protocol specification. ...
Download