| Tag | Field Name | Abbr Name | Data Type | Union Datatype | Description | Pedigree |
|---|---|---|---|---|---|---|
| 2874 | UnderlyingID | UdlyID | String | Unique identifier for the underlying instrument within the context of a message. The UnderlyingID(2874) can be referenced by other fields, for example UnderlyingRefID(2841) and SideUnderlyingRefID(2863), from other components. The scope of uniqueness is agreed upon between counterparties. | Added EP254 Updated EP306 |
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