| 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 |
| AA | derivative security list |
| AB | new order multileg |
| AC | multileg order cancel replace |
| 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 |
| AT | allocation report ack |
| AU | confirmation ack |
| AV | settlement instruction request |
| AW | assignment report |
| AX | collateral request |
| AY | collateral assignment |
| AZ | collateral response |
| B | news |
| BA | collateral report |
| BB | collateral inquiry |
| BC | network status request |
| BD | network status response |
| BE | user request |
| BF | user response |
| BG | collateral inquiry ack |
| BH | confirmation request |
| C | email |
| 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 | dont know trade |
| 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 |
| 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 replace 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 |