What Does Open Financial Exchange (OFX) Mean?
Open Financial Exchange (OFX) is a freely-licensed unified specification for the electronic exchange of financial data through the Internet, and between or among financial institutions, businesses and customers. OFX is not a financial institution.
Techopedia Explains Open Financial Exchange (OFX)
OFX versions 1.0 and 1.6 were extended from Extensible Markup Language (XML) and Standard Generalized Markup Language (SGML). This made them simple to use in creating well-formed OFX documents.