Alternative Security Identifiers

The “Alternative Security Identifiers” block contains all additional identifiers for instrument.

Table 22 – Alternative Security Identifiers Block

Tag	FieldName	Req’d	Comments	Format
455	SecurityAltID	Y	Alternative ID for an instrument	String
456	SecurityAltIDSource	Y	Identifies class or source of SecurityAltID<455>. Used values: 4 = ISIN number	String

Tag

FieldName

Req’d

Comments

Format

455

SecurityAltID

Alternative ID for an instrument

String

456

SecurityAltIDSource

Identifies class or source of SecurityAltID<455>.

Used values:

4 = ISIN number

String