Trading Status Message Fields
The Trading Status message is used to indicate the current trading status of a security on a Cboe exchange. A Trading Status message will be sent whenever a security’s trading status changes.
A Trading Status message will be sent:
- for Regulatory Halts in any security as well as the Trading resumption for the same security.
- for Cboe Listed securities that are in a Quoting period for auctions.
- to indicate a Reg SHO price test is in effect.
Table 1. Trading Status Message Fields Field Name JSON Value/Type Description messageType m Alphanumeric TS timestamp ts Integer - Timestamp of the matching engine trading status message emitted by the specified Market Center.
- Encoded as the number of nanoseconds since epoch.
symbol sy Alphanumeric Relevant symbol. marketCenter mc Alphanumeric - Y=BYX
- Z=BZX
- A=EDGA
- X=EDGX
tradingStatus h Alphanumeric - A=Accepting Orders for Queuing
- E=Early Trading (BYX, BZX, and EDGA only) (Effective 02/01/27)
- H=Halted
- L=Late / Post-Market Trading(Effective 02/01/27)
- O=Overnight Trading (EDGX only) (Effective 02/01/27)
- P=Pre-Market Trading(Effective 02/01/27)
- Q=Quote-Only (Cboe listings)
- S=Exchange Specific Suspension
- T=Trading(Effective 02/01/27, Regular Trading Hours)
regShoAction rs Alphanumeric - 0=No price test in effect
- 1=Reg SHO price test restriction in effect