Nasdaq proprietary connectivity. Accepts richer order types. Has no message restrictions.


QIX is an efficient protocol that allows automated, real-time trading. QIX offers reliability in placing orders and quotes in the Nasdaq system, while providing improved throughput and reduced latency.

Features: Supported Messages

  • Order entry, cancel, cancel/replace
  • Quote entry/update
  • Order delivery/execution
  • Unsolicited messages (UM), including execution, cancel/ reject, quote update
  • New proprietary quote information message


Connectivity Options

Who Can Participate

All Nasdaq market participants, including market makers, order-entry firms and ECNs can participate.

Additional Resources

How to Subscribe

Nasdaq market participants can subscribe for new connectivity or update an existing service:



Firms must be certified before they can send QIX messages to Nasdaq:

Technical Support

Contact Information