ListID (Tag = 66, Type: String)

Unique identifier for list as assigned by institution, used to associate multiple individual orders. Uniqueness must be guaranteed within a single trading day. Firms which generate multi-day orders should consider embedding a date within the ListID (66) field to assure uniqueness across days.

Used in:

• Execution Report (8)
• Order Cancel Reject (9)
• New Order - List (E)
• Order Cancel Request (F)
• Order Cancel/Replace Request (G)
• Allocation (J)
• List Cancel Request (K)
• List Execute (L)
• List Status Request (M)
• List Status (N)
• Bid Request (k)
• Bid Response (l)
• List Strike Price (m)

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