Defines message type. Always third field in message. Always unencrypted.
The value is case-sensitive.
"U" as the first character of the value (e.g. U1, U2) indicates that the message format is privately defined between the sender and receiver.
| Code | Meaning |
|---|---|
| 0 | Heartbeat |
| 1 | Test Request |
| 2 | Resend Request |
| 3 | Reject |
| 4 | Sequence Reset |
| 5 | Logout |
| 6 | Indication of Interest |
| 7 | Advertisement |
| 8 | Execution Report |
| 9 | Order Cancel Reject |
| A | Logon |
| B | News |
| C | |
| D | Order Single |
| E | Order List |
| F | Order Cancel Request |
| G | Order Cancel/Replace Request |
| H | Order Status Request |
| J | Allocation |
| K | List Cancel Request |
| L | List Execute |
| M | List Status Request |
| N | List Status |
| P | Allocation ACK |
| Q | Dont Know Trade (DK) |
| R | Quote Request |
| S | Quote |
| T | Settlement Instructions |
| V | Market Data Request |
| W | Market Data-Snapshot/Full Refresh |
| X | Market Data-Incremental Refresh |
| Y | Market Data Request Reject |
| Z | Quote Cancel |
| a | Quote Status Request |
| b | Quote Acknowledgement |
| c | Security Definition Request |
| d | Security Definition |
| e | Security Status Request |
| f | Security Status |
| g | Trading Session Status Request |
| h | Trading Session Status |
| i | Mass Quote |
| j | Business Message Reject |
| k | Bid Request |
| l | Bid Response (lowercase L) |
| m | List Strike Price |