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 |
| 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 |
| R | QUOTE_REQUEST |
| S | QUOTE |
| T | SETTLEMENT_INSTRUCTIONS |
| V | MARKET_DATA_REQUEST |
| W | MARKET_DATA_SNAPSHOT |
| 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 |
| m | LIST_STRIKE_PRICE |
| n | XML_MESSAGE |
| 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 |
| 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 |
| 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 |