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 Instruction |
| K | List Cancel Request |
| L | List Execute |
| M | List Status Request |
| N | List Status |
| P | Allocation Instruction Ack |
| Q | Don’t 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 | Mass 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 |
| n | XML message (e.g. non-FIX MsgType) |
| o | Registration Instructions |
| p | Registration Instructions Response |
| q | Order Mass Cancel Request |
| r | Order Mass Cancel Report |
| s | New Order - Cross |
| t | Cross Order Cancel/Replace Request (a.k.a. Cross Order Modification Request) |
| u | Cross Order Cancel Request |
| v | Security Type Request |
| w | Security Types |
| x | Security List Request |
| y | Security List |
| z | Derivative Security List Request |
| AA | Derivative Security List |
| AB | New Order - Multileg |
| AC | Multileg Order Cancel/Replace (a.k.a. Multileg Order Modification Request) |
| AD | Trade Capture Report Request |
| AE | Trade Capture Report |
| AF | Order Mass Status Request |
| AG | Quote Request Reject |
| AH | RFQ Request |
| AI | Quote Status Report |
| AJ | Quote Response |
| AK | Confirmation |
| AL | Position Maintenance Request |
| AM | Position Maintenance Report |
| AN | Request For Positions |
| AO | Request For Positions Ack |
| AP | Position Report |
| AQ | Trade Capture Report Request Ack |
| AR | Trade Capture Report Ack |
| AS | Allocation Report (aka Allocation Claim) |
| AT | Allocation Report Ack (aka Allocation Claim Ack) |
| AU | Confirmation Ack (aka Affirmation) |
| AV | Settlement Instruction Request |
| AW | Assignment Report |
| AX | Collateral Request |
| AY | Collateral Assignment |
| AZ | Collateral Response |
| BA | Collateral Report |
| BB | Collateral Inquiry |
| BC | Network (Counterparty System) Status Request |
| BD | Network (Counterparty System) Status Response |
| BE | User Request |
| BF | User Response |
| BG | Collateral Inquiry Ack |
| BH | Confirmation Request |