Type: data
Encoded (non-ASCII characters) representation of the MarketDisruptionFallbackUnderlierSecurityDesc (41100) field in the encoded format specified via the MessageEncoding (347) field. If used, the ASCII (English) representation should also be specified in the MarketDisruptionFallbackUnderlierSecurityDesc (41100) field.
Added in protocol FIX.5.0SP2 (169)