Auction Notification Message Fields

Auction Notification messages are used to disseminate order details of a complex auction. Auctions will be available for a defined period of time known as the exposure period.

Table 1. Auction Notification
Field NameOffsetLengthType/(Value)Description
Length01BinaryLength of this message including this field
Message Type110xAD Auction Notification message
Time Offset24Time OffsetNanosecond offset from last unit timestamp.
Complex Instrument Id66Printable ASCIIComplex Instrument Id right padded with spaces.
Auction ID128BinaryDay specific identifier assigned to this auction.
Auction Type201Alphanumeric
  • C=Complex Auction (COA)
  • B=Complex AIM
Side211Alphanumeric
  • B=Buy
  • S=Sell
Price228Binary Signed Long Price
  • Auction price.
  • This is the auction price of the option legs only and does not include the futures leg price.
Quantity304BinaryInstrument quantity.
Customer Indicator341Alphanumeric
  • N=Non-Customer
  • C=Customer
ParticipantID354AlphanumericExecuting Broker (optional) of firm attributed to this quote.
  • Auction End
  • Offset
394BinaryNanosecond offset from last timestamp.
Client ID434AlphanumericOptional user specified value attributed to this quote. Space filled otherwise.
Total Length = 47 bytes
Cboe Titanium U.S. Options Complex Multicast Futures Options Order Type PITCH Specification - Auction Notification | Cboe