TagField NameAbbr NameData TypeUnion DatatypeDescriptionPedigree
390BidIDBidIDString

For bid lists, unique identifier for BidResponse(35=I) as assigned by sell-side (broker, exchange, ECN). Uniqueness must be guaranteed within a single trading day.
For quotes, unique identifier for the bid side of the quote assigned by the quote issuer.

Added FIX.4.2 Updated EP144
Used in messages:
[BidRequest][BidResponse][ListExecute][NewOrderList][Quote][QuoteStatusReport]