Nasdaq Delays FIX Protocol: More Time for Traders to Avoid Self-Trades
Published Date: 4/3/2026
Notice
Summary
Nasdaq Texas is updating a rule that helps stop trades from accidentally happening within the same firm, which keeps trading costs lower for everyone. They’re also pushing back the start date for a new order entry system called CORE FIX to give everyone more time to get ready. These changes affect traders using Nasdaq Texas and aim to make trading smoother and fairer, with no extra costs right now.
Analyzed Economic Effects
2 provisions identified: 2 benefits, 0 costs, 0 mixed.
Anti‑Internalization Added for FIX Users
If you are a market participant on Nasdaq Texas, the Exchange is amending Rule 4757 to make its Port‑Level Anti‑Internalization Functionality available to orders entered via the FIX protocol. The rule already reflects that FLITE users have this functionality, and the FLITE-related portion becomes operative 30 days after the filing (filed March 30, 2026), i.e., April 29, 2026. This functionality prevents quotes/orders with a unique group modifier entered through the same port from executing against each other, which helps reduce unwanted internal executions and related trading costs.
CORE FIX Implementation Pushed to End of 2026
If you planned to use Nasdaq Texas's new CORE FIX order entry protocol, its implementation date moved from the first quarter of 2026 to before the end of 2026. The Exchange filed the change on March 30, 2026 and said it will issue an Equity Trader Alert ahead of CORE FIX going live.
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Key Dates
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