SEC clears overnight SIP data, reshaping the daily market recap
The SEC approved CTA, CQ and UTP plan amendments letting public data feeds run from 9 p.m. Sunday to 8 p.m. Friday ET, with a target start of December 6, 2026.
| Item | Detail |
|---|---|
| Date | June 26, 2026 |
| Orders | 34-105779 (CTA/CQ), 34-105780 (UTP) |
| New processor hours | 9:00 p.m. Sunday to 8:00 p.m. Friday ET |
| Nightly pause | 8:00 to 9:00 p.m. ET, Monday to Thursday |
| Overnight trade marker | ”.T” (CTA) |
| Trading day (UTP) | 8:00 p.m. prior day to 8:00 p.m. current day |
| Implementation date | December 6, 2026 |
| Comments on amended CTA/CQ proposal | None received |
The Securities and Exchange Commission on June 26, 2026 approved amendments to the national market system plans that run the public consolidated data feeds, clearing the way for quotes and trades from overnight sessions to appear on the same feeds that power every end-of-day market recap. The orders cover the CTA and CQ plans, which handle securities listed on NYSE and other exchanges, and the UTP plan, which handles Nasdaq-listed securities.
Under both orders, the securities information processors will receive and disseminate quotation and last-sale data from 9:00 p.m. Eastern on Sunday through 8:00 p.m. Friday, with a one-hour pause from 8:00 to 9:00 p.m. Monday through Thursday for system maintenance. Implementation is expected on December 6, 2026. The CTA/CQ order states that overnight transactions will carry a ”.T” identifier.
The UTP amendment also defines the trading day as running from 8:00 p.m. Eastern on the prior day through 8:00 p.m. on the current day. That definition matters for anyone who compiles daily statistics, since a trade at 10:00 p.m. on a Tuesday will belong to Wednesday’s trading day. Under both orders, the costs of developing and operating the extended hours are to be covered by the exchanges taking part in overnight trading, rather than spread across all plan participants.
The CTA/CQ proposal was published on January 27, 2026, and amended on April 17. The Commission said it received no comments on the amended version.
The orders are a prerequisite for exchange plans to trade through the night. Nasdaq’s 23-hour trading approval in April was conditioned on the data plans confirming they could carry overnight data, and these amendments supply that capability. For data vendors, brokers and publishers, the practical change is that daily volume, high, low and last-sale figures will draw on a longer window, and systems that assume a 4:00 a.m. to 8:00 p.m. data day will need updating.
What to watch: the December 6 implementation, readiness testing by the processors and participating exchanges, and how index providers and media define the session boundaries used in a daily market recap once overnight prints flow through the consolidated tape.
Prepared with AI assistance from public sources and reviewed under our editorial policy. Not investment advice.