Changelog
Every change to the FIX specifications is announced here before it takes effect. An entry gives the version, what changed, the date from which the change is mandatory, and its effect on certification. A firm certified against an earlier version can keep using it until the mandatory date in the entry.
v1.00 — 17 September 2026
Initial release of the FIX Taker and Maker specifications.
| Documents | Taker specification, Maker specification |
| Mandatory from | Not applicable, initial release |
| Certification | All new connections certify against v1.00 |