U.S. Options

MIAX Emerald Options Exchange has published updated Interface Specifications to support the following system enhancements:

Complex Orders – Stock-tied Orders will support 4 Decimals (Scheduled to be deployed between October 15th-21st 2022):

• FIX Interface Specification (FOI) - Version 1.1a
  • Updated New Order – Multileg (MsgType = "AB")
    • FIX Tag Price (#44) will now accept up to 4 decimal places for stock-tied orders
  • Updated New Order Cross – Multileg (MsgType = "As")
    • FIX Tag Price (#44) will now accept up to 4 decimal places for stock-tied cPRIME and cQCC orders
  • Updated Order Cancel/Replace – Multileg (MsgType = "AC")
    • FIX Tag Price (#44) will now accept up to 4 decimal places for stock-tied orders

Trade Conditions in older CTD versions (Scheduled to be deployed between October 15th-21st 2022, pending SEC approval):

• Clearing Trade Drop (CTD) - Version 1.2a
  • Noted that CTD1.0 will always have a trade condition of Regular(‘ ‘/space) for all system generated automatic trades.

Fill-Or-Kill (FOK) eQuotes removed from the Interface specification as it is no longer supported:

• MIAX Express Interface (MEI) - Version 2.1c
  • FOK eQuotes references removed throughout the document

Order price clarifications based on new price protections (Scheduled to be deployed in November 2022, pending SEC approval):

• MIAX Order (MOR) Feed – Version 1.1a
  • Simple order price will be the original limit price of the order
  • Complex order price will be the effective limit price of the order

These features are currently available in the Firm Test Bed (FTB2) environment.

Please review the updated interface specifications for further details on the MIAX website at MIAX Emerald Options Exchange Specifications

Please contact MIAX Trading Operations at TradingOperations@miaxglobal.com or (609) 897-7302 to discuss any specific issues and to arrange interface testing.