| Tag | Field Name | Data Type | Union Datatype | Description | Added | Depr. | Enums from tag |
|---|---|---|---|---|---|---|---|
| 243 | UnderlyingRepoCollateralSecurityType | String |
Underlying security’s RepoCollateralSecurityType. See RepoCollateralSecurityType (239) field for description (Note tag # was reserved in FIX 4.1, added in FIX 4.3) | Added FIX.4.3 |
|