| Tag | Field Name | Data Type | Union Datatype | Description | Added | Depr. | Enums from tag |
|---|---|---|---|---|---|---|---|
| 200 | MaturityMonthYear | MonthYear |
Month and Year of the maturity for SecurityType=FUT or SecurityType=OPT. Required if MaturityDay is specified. Format: YYYYMM (i.e. 199903) | Added FIX.4.1 |
|