# 2026-16201: Stock Markets Get Nighttime Speed Bumps to Tame Wild Swings

2026-16201, Joint Industry Plan; Order Granting Approval of the Twenty-Seventh Amendment to the National Market System Plan To Address Extraordinary Market Volatility To Establish Temporary Price Band Protections in Overnight Trading, is a Federal Register notice from Securities and Exchange Commission published 2026-08-10, effective 2026-12-06; PRIA reads it as touching household money (as of 2026-08-17).

- Canonical: https://policyrisk.com/federal-register/2026-16201
- As of: 2026-08-17
- Plain-text twin of the page above; the HTML and this file carry the same facts.

## Facts
- Document number: 2026-16201
- Title: Joint Industry Plan; Order Granting Approval of the Twenty-Seventh Amendment to the National Market System Plan To Address Extraordinary Market Volatility To Establish Temporary Price Band Protections in Overnight Trading
- Type: Notice
- Agencies: Securities and Exchange Commission
- Citation: 91 FR 51515
- Published: 2026-08-10
- Effective: 2026-12-06
- Comments close: not stated
- Significant: no
- Touches household money: yes
- Regulation identifier numbers: none
- Last updated: 2026-08-17

## In one line

Stock Markets Get Nighttime Speed Bumps to Tame Wild Swings

## Summary

Starting soon, stock markets will have new safety rules to keep prices steady during overnight trading, helping prevent wild price swings. This change affects all major U.S. stock exchanges and aims to protect investors by setting temporary price limits when trading happens outside regular hours. These protections will roll out in phases, making overnight trading safer without impacting normal market hours or costs.

## Effects PRIA read

- Overnight 20% Price Bands: benefit, medium. During Overnight Protected Hours (9:00 p.m. ET Sunday through Thursday to 4:00 a.m. ET next day), Primary Listing Exchanges will publish Overnight Price Bands based on two reference prices. The Overnight Lower Price Band will be 20% below the lower of the two reference prices and the Overnight Uppe…
- Regulatory Halts and Order Rejections Overnight: cost, medium. If warranted, the Primary Listing Exchange may declare a Regulatory Halt during Overnight Protected Hours and will notify the Processor; during a Regulatory Halt Participants will reject orders and any NMS Stock subject to a Regulatory Halt will not reopen during Overnight Protected Hours. There wi…
- Markets Must Publish Bands Before 9pm: cost, low. Primary Listing Exchanges must calculate and transmit Overnight Price Bands to the Processors no later than 8:55 p.m. ET and the Processors will disseminate those bands to the public prior to 9:00 p.m. ET. All trading centers operating during Overnight Protected Hours must establish, maintain, and…

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## Sources
- [2026-16201 on federalregister.gov](https://www.federalregister.gov/documents/2026/08/10/2026-16201/joint-industry-plan-order-granting-approval-of-the-twenty-seventh-amendment-to-the-national-market)
- [2026-16201 as published (PDF)](https://www.govinfo.gov/content/pkg/FR-2026-08-10/pdf/2026-16201.pdf)

## Related
- [Previous: 2026-16200, Sunshine Act Meetings](https://policyrisk.com/federal-register/2026-16200)
- [Next: 2026-16202, Agency Information Collection Activities; Submission for OMB Review; Comment Re…](https://policyrisk.com/federal-register/2026-16202)
- [All Federal Register documents](https://policyrisk.com/federal-register)

Source: PRIA, https://policyrisk.com/federal-register/2026-16201 (as of 2026-08-17).