Self-Regulatory Organizations; Investors Exchange LLC; Notice of Filing and Immediate Effectiveness of Proposed Rule Change Pursuant to IEX Rule 15.110(a) and (c) To Modify the Required Criteria To Qualify for the Reduced Incremental Fee
Published Date: 10/9/2026
Notice
Summary
Investors Exchange (IEX) is changing the rules for who can get a discount on certain trading fees. Starting November 1, 2026, members will need to meet new criteria to qualify for the reduced incremental fee, which could save or cost them money depending on their trading activity. This change affects all IEX members and kicks in right away to keep things fair and clear.
Analyzed Economic Effects
4 provisions identified: 1 benefits, 2 costs, 1 mixed.
Higher Volume Needed for Fee Discount
Starting November 1, 2026, most IEX Members must exceed their Baseline non-displayed average daily volume (ADV) by 20,000,000 Incremental Fee eligible shares in the prior month to qualify for the reduced Incremental Fee Tier 2 (up from 15,000,000). If you do not meet the new 20,000,000 threshold, you will not qualify for the reduced $0.0001 per-share fee and instead will be charged the regular $0.0010 per-share fee for that volume.
Lower Threshold Kept for High Displayed Liquidity Adders
If in the prior month you qualified for one of IEX's two highest displayed liquidity adding rebate tiers, you continue to qualify for Incremental Fee Tier 2 if your Incremental non-displayed ADV exceeded your Baseline non-displayed ADV by at least 15,000,000 (not 20,000,000). To qualify for Tier 8 in the current month you must have added at least 40,000,000 ADV of displayed liquidity in the prior month; to qualify for Tier 9 you must have added at least 50,000,000 ADV of displayed liquidity in the prior month.
How Reduced Fees and Caps Are Applied
IEX charges a base rate of $0.0010 per share for executions that add or remove non-displayed liquidity, but Members that qualify for Incremental Fee Tier 2 pay a reduced $0.0001 per share for a capped portion of their Incremental Fee eligible ADV. The amount eligible for $0.0001 is capped at the Member's Baseline non-displayed ADV unless the Member has qualified for Tier 2 for at least the three immediately preceding months, in which case the cap doubles and any additional volume above those caps may be charged $0.0004 per share.
Sub-Dollar Trades Not Eligible or Impacted
Trades with an execution price below $1.00 per share (sub-dollar trades) are not affected by this rule change: they do not impact Incremental Fee Tier calculations and are not eligible for any of the Incremental Fee Tiers described in this filing.
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