# 2026-07821: Cboe EDGX Opens Auctions to More Market-Makers

2026-07821, Self-Regulatory Organizations; Cboe EDGX Exchange, Inc.; Notice of Filing and Immediate Effectiveness of a Proposed Rule Change To Amend Rules 21.19 and 21.21 To Permit Orders for the Accounts of Market-Makers With an Appointment in the Applicable Class To Be Solicited for the Initiating Order for a Simple AIM or Simple SAM Auction, is a Federal Register notice from Securities and Exchange Commission published 2026-04-22, effective 2026-04-07; PRIA reads it as touching household money (as of 2026-06-08).

- Canonical: https://policyrisk.com/federal-register/2026-07821
- As of: 2026-06-08
- Plain-text twin of the page above; the HTML and this file carry the same facts.

## Facts
- Document number: 2026-07821
- Title: Self-Regulatory Organizations; Cboe EDGX Exchange, Inc.; Notice of Filing and Immediate Effectiveness of a Proposed Rule Change To Amend Rules 21.19 and 21.21 To Permit Orders for the Accounts of Market-Makers With an Appointment in the Applicable Class To Be Solicited for the Initiating Order for a Simple AIM or Simple SAM Auction
- Type: Notice
- Agencies: Securities and Exchange Commission
- Citation: 91 FR 21550
- Published: 2026-04-22
- Effective: 2026-04-07
- Comments close: not stated
- Significant: no
- Touches household money: yes
- Regulation identifier numbers: none
- Last updated: 2026-06-08

## In one line

Cboe EDGX Opens Auctions to More Market-Makers

## Summary

Cboe EDGX Exchange is updating its rules to let market-makers with the right appointment join in special auctions called Simple AIM and Simple SAM. This change means these market-makers can now have their orders considered when matching trades, making the process smoother and more competitive. The new rules took effect right away on April 7, 2026, helping market-makers and traders move faster and possibly save money.

## Effects PRIA read

- Appointed Market‑Makers May Be Solicited: benefit, medium. If you are an appointed market‑maker on Cboe EDGX, Rules 21.19 and 21.21 were changed so your orders can be solicited as the Initiating Order in simple AIM and simple SAM auctions. This rule change became operative upon filing on April 7, 2026 and gives appointed market‑makers more ways to particip…
- More Price Improvement for Retail Orders: benefit, medium. You may see more chances for price improvement on retail and smaller customer options orders because appointed Market‑Makers can now be solicited to provide contra interest in simple AIM and simple SAM auctions. The Exchange expects this change to expand available liquidity in those auctions and to…
- More Competitive, Efficient Auctions: benefit, medium. The rule change is intended to increase competition among Market‑Makers and help brokers more efficiently locate liquidity to fill customer orders, including during volatile times. The Exchange says permitting appointed Market‑Makers to be solicited may lead to more aggressive initial auction price…

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## Sources
- [2026-07821 on federalregister.gov](https://www.federalregister.gov/documents/2026/04/22/2026-07821/self-regulatory-organizations-cboe-edgx-exchange-inc-notice-of-filing-and-immediate-effectiveness-of)
- [2026-07821 as published (PDF)](https://www.govinfo.gov/content/pkg/FR-2026-04-22/pdf/2026-07821.pdf)

## Related
- [Previous: 2026-07820, Self-Regulatory Organizations; Cboe BZX Exchange, Inc.; Notice of Filing of a P…](https://policyrisk.com/federal-register/2026-07820)
- [Next: 2026-07822, Self-Regulatory Organizations; National Securities Clearing Corporation; Order…](https://policyrisk.com/federal-register/2026-07822)
- [All Federal Register documents](https://policyrisk.com/federal-register)

Source: PRIA, https://policyrisk.com/federal-register/2026-07821 (as of 2026-06-08).