Type: MonthYear
Underlying security’s MaturityMonthYear. Required if UnderlyingMaturityDay is specified.
See MaturityMonthYear (200) field for description
Added in protocol FIX.4.2
See in: FIX.4.2, FIX.4.4, FIX.5.0, FIX.5.0SP1, FIX.5.0SP2, FIX.5.0SP2 EP240.