Trading Status Message Fields
The Trading Status message is used to indicate the current trading status of an options contract. A Trading Status message will be sent whenever a security’s trading status changes. The following summarizes the Trading Status values in the Cboe system:
- H=Halt state.
- L=Curb Trading. Sent when symbol is open for trading at or after 4:15 p.m. ET. (C1 only).
- Q=Queuing. Sent starting at 7:30 a.m. ET once orders can be accepted for queuing in preparation for the RTH open.
- T=RTH Trading. Sent when symbol is open for trading, at or after 9:30 a.m. ET.
Cboe will send a Trading Status of L as Curb-eligible Products transition from RTH trading to Curb trading.
A Trading Status message will also be sent:
- For a Regulatory Halt Queuing period in any symbol where the underlying has experienced a Regulatory Halt as well as the Trading resumption for the same instrument.
The Trading Status field will be used to represent the status of the RTH and Curb sessions. The GTH Trading Status field will be used to represent the status of series that trade during the GTH session.
| Field Name | Offset | Length | Type/(Value) | Description |
|---|---|---|---|---|
| Length | 0 | 1 | Binary | Length of this message including this field |
| Message Type | 1 | 1 | 0x31 | Trading Status message |
| Time Offset | 2 | 4 | Time Offset | Nanosecond offset from last unit timestamp |
| Symbol | 6 | 6 | Printable ASCII | Symbol right padded with spaces. |
| Reserved | 12 | 2 | Reserved | Reserved |
| Trading Status | 14 | 1 | Alpha |
|
| Reserved | 15 | 1 | Reserved | Reserved |
| GTH Trading Status (C1 Only) | 16 | 1 | Alpha |
|
| Reserved2 | 17 | 1 | Alpha | Reserved |
| Total Length=18 bytes | ||||