The ISO 18774 standard incorporates the issuer short name and the abbreviated characteristics for the financial instrument. It has a maximum length of 35 alphanumeric characters.
Unlike other ISO-standard financial instrument identification codes, the FISN is not meant to be machine-readable, but to provide a short format for essential information about a security for human use.
The FISN is composed of:
- an “/” as the delimiter between issuer name and instrument description
- an issuer name with a maximum length of 15 alphanumeric characters. To ensure uniformity, the same issuer short name should be used for different financial instruments of the same issuer.
- an instrument description with a maximum length of 19 alphanumeric characters, assuming that the available length of the issuer name has been fully used. In the event that all the 15 characters have not been used in the issuer short name, the remaining space may be used to describe the characteristics of the financial instrument.