Appendix D: Order State Change Matrices

D20 – Unsolicited replacement of a part-filled order

Time Message Received (ClOrdID, OrigClOrdID) Message Sent (ClOrdID, OrigClOrdID) Exec Type OrdStatus Exec Trans Type Order Qty Cum Qty Leaves Qty Last Shares Comment
1 New Order(X) 10000
2 Execution(X) Rejected Rejected New 10000 0 0 0 If order is rejected by broker
2 Execution(X) New New New 10000 0 10000 0
3 Broker verbally agrees to increase order quantity to 11000
4 Execution(X) Restated New New 11000 0 0 0 Broker signifies that order has been replaced ExecRestatementReason = Verbal
5 Execution(X) Partial Fill Partially Filled New 11000 1000 10000 1000 Execution for 1000
6 Broker verbally agrees to increase order quantity to 12000
7 Execution(X) Restated Partially Filled New 12000 1000 11000 0 Broker signifies that order has been replaced ExecRestatementReason = Verbal change

This scenario might occur if the buy-side has not implemented order cancel/replace requests or alternatively there is an electronic communication problem at the point that the buy-side wishes to send a cancel replace request

Back to Appendix D: Order State Change Matrices