Nasdaq BX Outlaws Sneaky Options Order Unbundling Tricks
Published Date: 12/22/2025
Notice
Summary
Nasdaq BX is making a new rule official that says splitting up options orders just to game the system isn’t fair play. This affects all traders and firms using BX options, making sure everyone plays by the same honest rules. The change is effective immediately, keeping the market clean without adding extra costs or delays.
Analyzed Economic Effects
1 provisions identified: 1 benefits, 0 costs, 0 mixed.
Exchange bans options 'unbundling' practice
Nasdaq BX adopted BX Options 9, Section 25 on December 11, 2025 to make it a rule that members may not split an order into multiple smaller orders for any purpose other than seeking the best execution of the entire order. The rule codifies longstanding guidance to deter "unbundling" (also called "trade shredding") and became effective immediately upon filing.
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