ExecID (Tag = 17, Type: String)

Unique identifier of Execution Report (8) message as assigned by broker (will be 0 (zero) for ExecTransType (20) =3 (Status)).

Uniqueness must be guaranteed within a single trading day or the life of a multi-day order. Firms which accept multi-day orders should consider embedding a date within the ExecID (17) field to assure uniqueness across days.

(Prior to FIX 4.1 this field was of type int)

Used in:

• Execution Report (8)
• Allocation (J)
• Don't Know Trade (Q)