| Tag | Field Name | XML Name | Data Type | Union Datatype | Description | Added | Depr. | Enums from tag |
|---|---|---|---|---|---|---|---|---|
| 313 | UnderlyingMaturityMonthYear | @MMY | MonthYear |
Underlying security’s MaturityMonthYear. Can be used with standardized derivatives vs. the UnderlyingMaturityDate (542) field. See MaturityMonthYear (200) field for description | Added FIX.4.2 |
|