The UnderlyingPaymentScheduleFixingDayGrp is a repeating subcomponent of the UnderlyingPaymentScheduleGrp component used to detail periodic fixing days.
| Tag | Name | Type | Required | Description | 
|---|---|---|---|---|
| 41878 | NumInGroup | Number of fixing days in the repeating group.
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| 41879 | Int Enum | Required if NoUnderlyingPaymentScheduleFixingDays(41878) > 0
  | ||
| 41880 | Int |