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Investors Exchange LLC ("IEX" or the "Exchange") is a national securities exchange subject to regulation by the Securities and Exchange Commission as a self-regulatory organization ("SRO"). IEX Regulation conducts and oversees performance of the Exchange's SRO obligations and functions, in part through a regulatory services agreement with FINRA.

This page contains links to IEX rules and other regulatory resources and information.

Please contact regulation@iextrading.com with any questions or inquiries regarding regulatory matters, or to submit a tip or complaint regarding activity that may violate IEX rules or the federal securities laws. IEX Regulation will review the matter and determine appropriate next steps, which may include referral to FINRA or another regulatory authority. All tips or complaints, and any subsequent investigation are subject to IEX’s Regulatory Independence and Confidentiality Policy.


Information circulars provide important details about regulatory, product, and general matters on Investors Exchange.

See our Circulars

Regulatory Independence and Confidentiality Policy Overview

Overview of IEX’s internal regulatory independence and confidentiality policy.

Policy Overview

FINRA Rules Incorporated by Reference

See our FINRA Rules Incorporated by Reference

Rule 605 Reports

The SEC's rule mandating public disclosure of order execution practices, Rule 605 (formerly SEC Rule 11Ac1-5), requires that market centers which trade national market system securities disclose monthly electronic reports about the quality of their executions on a stock-by-stock basis based on the previous month's trading activity.

See our 605 Reports

Tick Size Pilot Program

On May 6, 2015, the Securities & Exchange Commission ("SEC") issued an order approving the National Market System ("NMS") Plan to implement a Tick Size Pilot Program by the National Securities Exchanges and FINRA. The Order approved the NMS Plan for a two-year period and officially commenced on October 3, 2016. The Tick Size Pilot was a data-driven test to evaluate whether or not widening the tick size for securities of smaller capitalization companies would impact trading, liquidity, and market quality of those securities. The pilot consisted of a control group and three test groups, with each test group having approximately 400 securities.

On March 29, 2019, the data collection requirements under the National Market System Plan to implement a Tick Size Pilot Program came to an end. As a result, a blank Tick Pilot Securities List will be produced on a daily basis, and the Tick Pilot Changes List has been updated to show the deletion of securities from the Tick Size Pilot Securities List.

See our Tick Size Pilot Program Data and Statistics

Clearly Erroneous Rule

See our Clearly Erroneous Rule

Business Continuity

IEX has developed a Business Continuity Plan ("BCP" or the "Plan") detailing how the Firm will address the possibility of a future Significant Business Disruption ("SBD") and respond to events of a varying scope which may impact the Firm’s business. Since the timing and impact of disasters and disruptions is unpredictable, the Firm will have to be flexible in responding to actual events as they occur. With that in mind, the Firm is providing you with this information regarding its Plan.

PDF iconSee our Business Continuity

NMS Plans

See our NMS Plans

Disciplinary Actions

FINRA, on behalf of IEX, investigates potential violations of IEX rules and the federal securities laws and, when appropriate, brings formal disciplinary action against members and their associated persons.

See Disciplinary Actions


There are no issuers currently listed on IEX. For any questions about historical listing information, please contact IEX Regulation.

Contact IEX Regulation