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Thursday, August 4, 2022

Options Technical Update #2022 - 9
Nasdaq MRX Updates FIX Replatform Technical Specifications



  • System Impact

Markets Impacted:

Contact Information:


Nasdaq MRX (MRX) has updated Replatform technical specifications for FIX. Tag 11 (ClOrdId) will support up to 30 characters instead of 20. The changes are for the following messages:

  • New Order Single message
  • New Order Cross message
  • New Order Multileg message
  • New Order Cross - Multileg message
  • Order Cancel Request message
  • Order Cancel/Replace Request message

Please contact Market Operations with any questions.

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