FIX Field 461
Indicates the type of security using ISO 10962 standard, Classification of Financial Instruments (CFI code) values. ISO 10962 is maintained by ANNA (Association of National Numbering Agencies) acting as Registration Authority. See "Appendix 6-B FIX Fields Based Upon Other Standards". See also the Product (460) and SecurityType (167) fields. It is recommended that CFICode be used instead of SecurityType (167) for non-Fixed Income instruments.
A subset of possible values applicable to FIX usage are identified in "Appendix 6-D CFICode Usage - ISO 10962 Classification of Financial Instruments (CFI code)"
Error in FIX Specification:
Note that there has been a change of view on the above guidance. Quoting from http://fixprotocol.org/discuss/read/84db3b32:
I think it was in FIX 5.0 SP1 that we realized the folly of trying to standardize on ISO 10962 (CFI) and have reversed some of the decisions. You'll see for example in PRODUCT:FOREIGN EXCHANGE section of Vol. 7 that we backed away from CFI and used Product and SecurityType. Additionally the PutOrCall was reinstated (was previously deprecated in 4.4) so that it can be used in conjunction with Product and SecurityType.