Trading Status Message Fields
The Trading Status message is used to indicate the current trading status of a security. A Trading Status message will be sent whenever a security's trading status changes. In addition, Cboe will send a Trading Status message for all securities that are "Halted" or have a price test in effect before the start of trading hours.
Trading Status of S will be implied at system startup. T will be sent as securities are available for trading. A will be distributed when orders can be accepted for queuing in preparation for the market open.
Sequenced Trading Status messages are sent upon system start up for all active securities with Trading Status = S (suspended). Trading Status messages will continue to be published upon symbol state changes, such as at the beginning of order acceptance.
| Field Name | Offset | Length | Data Type | Description |
|---|---|---|---|---|
| Timestamp | 0 | 8 | Timestamp | Timestamp |
| Message Type | 8 | 1 | H | Trading Status message |
| Stock Symbol | 9 | 8 | Printable ASCII | Stock symbol right padded with spaces. |
| Halt Status | 17 | 1 | Alpha |
|
| Reg SHO Action | 18 | 1 | Numeric |
|
| Reserved1 | 19 | 1 | Alpha | Reserved |
| Reserved2 | 20 | 1 | Alpha | Reserved |