Mondo Visione Worldwide Financial Markets Intelligence

FTSE Mondo Visione Exchanges Index:

Fill-Or-Kill Orders Will No Longer Be Supported On The MIAX Options Exchange

Date 08/04/2021

MIAX Options will remove the availability of the Fill-or-Kill (“FOK”) message type as outlined below.


  • On Monday, 4/12, FOK orders will be rejected on Cloud 21.
  • On Tuesday, 4/13, FOK orders will be rejected on Clouds 18-20.
  • On Wednesday, 4/14, FOK orders will be rejected on Clouds 1-8.
  • On Thursday, 4/15, FOK orders will be rejected on Clouds 9-17 and 22-24.

Please refer to MIAX Options Regulatory Circular 2021-21 for more information.