U.S. Options

Reminder, on October 5,2020 the MIAX Emerald Options Exchange had published an updated MIAX Express Interface (MEI) Specification v2.1b with the following changes:
  
MIAX Express Interface (MEI) v2.1b Specification Updates:

• Resized the window size to 4k to accommodate up to 4 in-flight full 50 quote block messages sent by the member firms
• Hot Topics section
  • Added note about the Reconnect delay
• Configuration section
  • Added a new feature to allow cancel, execution and stock leg execution notifications to be sent solely on sourcing port on which the liquidity was originated by the firm. Upon completion of the rollout of this version, it is highly recommended for Firms to evaluate using this feature to most efficiently receive notifications.  Users must contact TradingOperations@miaxglobal.com to enable this feature.

The reconnect delay and in-flight changes are mandatory and will be deployed for all MIAX Emerald Options MEI subscribing firms according the rollout schedule below. The changes related to the cancel, execution and stock leg execution notifications are optional.
 
The following is the revised rollout schedule for the MEI v2.1b release:
 
Revised Rollout Schedule of MEI V2.1b:

• Day 1: Matching Engine Environment 11 (Symbols Z – ZZZZ)
  • November 6, 2020 production activation
• Day 2: Matching Engine Environment 4 (Symbols G – HZZZ)
  • November 10, 2020 production activation
• Day 3: Matching Engine Environments 1 – 3 (Symbols A – FZZZ)
  • November 13, 2020 production activation
• Day 4: Matching Engine Environments 5 – 10 & 12 (Remaining Symbols)
  • November 16, 2020 production activation

Firm Test Bed Availability
The MIAX Express Interface (MEI) v2.1b release is currently available in Firm Test Bed (FTB2).
 
Please note: certification for this release (from v2.1 to v2.1b) is not required, but members are encouraged to verify their software in MIAX Emerald Options Firm Test Bed 2.

Please review the highlighted updated interface specifications for further details:

• MIAX Emerald Options Exchange Specification

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