Field UnderlyingMarketDisruptionFallbackOpenUnits (41875) - FIX Protocol FIX.5.0SP2 EP240

Type: Qty

If there are multiple underlying assets, this specifies the number of units (index or securities) that constitute the underlier of the swap. In the case of a basket swap, this is used to reference both the number of basket units, and the number of each asset components of the basket when these are expressed in absolute terms.

Added in protocol FIX.5.0SP2 (169)