underlying_security_id

The underlying_security_id attribute identifies the security that serves as the underlying reference for the derivative and is a string field.

See ESMA Guidelines for reporting under EMIR, Section 4.16, paragraph 246, page 160 for identification of an underlying asset by ISIN. FIRE stores the institution’s identifier for the underlying security separately from the derivative’s own identifier; an external reporting code may be obtained from the linked security record.