Trading Status Message Fields
The Trading Status message is used to indicate the current trading status of a complex instrument. A Trading Status message will be sent whenever a complex instrument trading status changes.
A Trading Status message will be sent for all complex instruments as they transition through various trading states.
Starting at 7:30 a.m. ET, Cboe will send a Trading Status of Q once orders can be accepted for queuing in preparation for the RTH open. At or after 9:30 a.m. ET, Cboe will send a Trading Status of T as series are open for trading. Cboe will send a Trading Status of L as SPX or VIX series transition from RTH trading to Curb trading.
A Trading Status message will also be sent:
- for a Regulatory Halt Q=Quotingperiod in any series where the underlying has experienced a Regulatory Halt as well as the T=Trading resumption for the same series.
- for instruments that are in a Q=Quoting period for auctions.
The Trading Status field will be used to represent the status of the RTH (9:30 a.m. ET - 4:15 p.m. ET) and Curb sessions. The GTH Trading Status field will be used to represent the status of series that trade during the GTH session. The GTH session runs from 8:15 p.m. to 9:25 a.m. ET for SPX and VIX series.
| 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 |
| Complex Symbol ID | 6 | 6 | Printable ASCII | Complex Symbol right padded with spaces. |
| Reserved | 12 | 2 | Reserved | Reserved |
| Trading Status | 14 | 1 | Alpha |
|
| Reserved | 15 | 1 | Reserved | Reserved |
| 16 | 1 | Alpha |
|
| Reserved2 | 17 | 1 | Alpha | Reserved |
| Total Length = 18 bytes | ||||