U.S. Options

MIAX Options has published updated Interface Specifications to support modifications to Complex Order Functionality for the following:

• Complex Top of Market Feed (cToM) (Required change)
  • Using existing reserved space, added Priority Customer Size at the Best Price to the following six quote message types:  b, o, e, f, m and w.
• MIAX Order Feed (MOR) (Required change)
  • Added the value “4 = Market Maker” to the existing Origin Field of the Complex Order Message
• FIX Order Interface (FOI) (Required change)
  • For the New Order – Multileg (MsgType = AB) Message, removed the “future phase” notation for the following Tags related to the submission of Market Maker Orders:
    • Tag 204 - CustomerOrFirm
    • Tag 440 - ClearingAccount
    • Tag 109 - ClientID

Please review the interface specifications for further details.  All specifications are currently available at MIAX Options Interface Specifications.

Important Dates:

• The above changes will be implemented on Monday, January 23, 2017 as per the alert published on December 15, 2016.
• The above interface updates will be available in the MIAX Firm Test Bed #2 (FTB2) environment on December 21, 2016.

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