MT 515 Field Specifications

49. Field 35B: Identification of the Financial Instrument

FORMAT

Option B

[ISIN1!e12!c] [4*35x]

(Identification of Security) (Description of Security)

PRESENCE

Optional in optional subsequence C2

DEFINITION

This field identifies the underlying financial instrument.

NETWORK VALIDATED RULES

At least Identification of a Security (Subfield 1) or Description of Security (Subfield 2) must be present; both may be present (Error code(s): T17).

ISIN is used at the beginning of Identification of Security (Subfield 1) and must be composed of uppercase letters only (Error code(s): T12).

USAGE RULES

The financial Instrument field 35B in the Financial Instrument Attributes subsequence must only be used for the identification of the underlying instrument(s) of a derivative. It must not be used, for example, for the listing of the underlying securities of an index.

When used in Description of Security (Subfield 2), codes must start and end with a slash '/'.

When an ISIN identifier is not used it is strongly recommended that one of the following codes be used as the first characters of the Description of Security (Subfield 2):

[/2!a/]	The ISO two-digit country code, followed by the national scheme number.
[/TS/]	Followed by the ticker symbol.
[/XX/]	Bilaterally agreed or proprietary scheme which may be further identified by a code or short description identifying the scheme used.
[/4!c/]	Code identifying the type of security identifier used. This code must be one published by ISO 20022 (ExternalFinancialInstrumentIdentificationTypeCode).

It is strongly recommended that the ISIN be used.