C.3.c: Cancel/replace request sent whilst execution is being reported — the requested order qty is below cum qty — order qty is amended to cum qty – Appendix D: Order State Change Matrices – FIX 5.0 SP2 – FIX Dictionary

C.3.c — Cancel/replace request sent whilst execution is being reported — the requested order qty is below cum qty — order qty is amended to cum qty

Time	Message Received (ClOrdID, OrigClOrdID)	Message Sent (ClOrdID, OrigClOrdID)	Exec Type	OrdStatus	Order Qty	Cum Qty	Leaves Qty	Last Qty	Comment
1	New Order(X)				10000
2		Execution(X)	Rejected	Rejected	10000	0	0	0	If order is rejected by sell-side (broker, exchange, ECN)
2		Execution(X)	New	New	10000	0	10000	0
3	Replace Request(Y,X)				7000				Client wishes to amend order qty to 7000
3		Execution(X)	Trade	Partially Filled	10000	8000	2000	8000	Execution for 8000 — the replace message and this execution report pass each other on the connection
4		Execution (Y,X)	Replace	Filled	8000	8000	0	0	The replace request is interpreted as requiring the balance of the order to be canceled — the "filled" order status takes precedence over "canceled".