Type: data
Encoded (non-ASCII characters) representation of the UnderlyingMarketDisruptionFallbackUnderlierSecurityDesc (41872) field in the encoded format specified via the MessageEncoding (347) field. If used, the ASCII (English) representation should also be specified in the UnderlyingMarketDisruptionFallbackUnderlierSecurityDesc (41872).
Added in protocol FIX.5.0SP2 (169)