U.S. Options

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

Contra Liquidity Type Indicator:

• FIX Interface Specification (FOI) - Version 2.6
  • Added Contra Liquidity Type to Additional Billing Parameters
• FIX Drop Specification (FXD) - Version 2.6
  • Added Contra Liquidity Type to Additional Billing Parameters
• CTD Interface Specification (CTD) - Version 2.6
  • Added Contra Liquidity Type to Additional Billing Parameters

MEI Originator Port Entitlements Functionality:

• MIAX Express Interface Specification (MEI) - Version 2.9b
  • A new feature that allows users to receive notifications by request on the port through which liquidity was submitted.  It is highly recommended that Firms evaluate the new functionality to optimize notification processes.

Cleanup of Deprecated Fill-or-Kill (FOK) Functionality:

• FIX Interface Specification (FOI) - Version 2.6
  • Removed FOK TIF from New Order – Single, Order Cancel/Replace Request – Single, and Execution Report – Single or Multi-leg
  • Removed FOK Order Type
• FIX Drop Specification (FXD) - Version 2.6
  • Removed FOK TIF from Execution Report
  • Removed FOK TIF from Additional Billing Parameters
• CTD Interface Specification (CTD) - Version 2.6
  • Removed FOK TIF from Trade Message
• MIAX Order Feed Interface Specification (MOR) - Version 2.5b
  • Removed FOK Order Type
• MIAX Express Interface Specification (MEI) - Version 2.9b
  • Removed FOK Enhanced Quotes (eQuotes) reference

Important Dates:

• These features are currently available in the Firm Test Bed (FTB2) environment
• These features are expected to be in production in July 2022

Please review the updated interface specifications for further details on the MIAX website at MIAX 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.