Technical Alert
MIAX Options
September 10, 2013 | 02:10 PM
MIAX Options - MIAX Express Interface (MEI) Message Upgrade - Friday, December 20,2013
By Friday, December 20, 2013, all MIAX Express Interface (MEI) users will be required to migrate to Limited Notifications for Cancels.
The Limited Notification enhancement will reduce notification traffic and improve system performance. The new Limited Notification feature will no longer distribute Cancel Notification Messages “XN” at the Product Level (Series) for the following Cancel Reasons:
a. “E” = Exchange Initiated Cancel
b. “U” = Firm Initiated Cancel
c. “R” = Canceled due to ARM protection
d. “T” = Canceled due to Trading halt
The above Cancel Notification Reasons can be reliably derived at the Underlying Symbol level using the Quote Protection Trigger Notification “QP” message.
Additional information regarding Limited Notifications can be found in the MEI Interface v1.5 Specification.
For further information or to arrange interface testing, please contact MIAX Trading Operations at TradingOperations@miaxglobal.com or (609) 897-7302.