A structured grammar — derived from Extensible Markup Language (XML) — that is encapsulated within standard messaging defined by the Financial Information Exchange (FIX) protocol. See FIX and XML.

Edit / The XML version of the Financial Information Exchange messaging protocol, developed originally by Fidelity Investments and Solomon Bothers. It is now used by banks for securities and money exhcnages. See Also: SWIFTML ISO-15022 ACORD

FIXML (Financial Information Exchange Markup Language) is an XML based messaging standard for the real-time electronic exchange of securities transactions. The first ever real-time FIXML trading application was introduced by XML pioneer Innovision Corp. in June 2000.