Cboe EDGX wins SEC approval for 23-hour weekday trading expansion

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Cboe EDGX 23-hour trading

Highlights

Cboe EDGX received SEC accelerated approval on its Amendment No. 1, enabling 23-hour weekday trading starting after the May 26, 2026 filing.
EDGX will implement a new Overnight Trading Session, expand its Pre-Opening Session, and rework trading rules to ensure compliance and transparency.
The extension aims to capture greater international participation, enhance U.S. equity market accessibility, and better align with global trading patterns.

Regulatory approval and trading structure

As reported by the Securities and Exchange Commission, Cboe EDGX filed the proposed rule change on March 31, 2026, and the regulator is now granting accelerated approval to Amendment No. 1 after the measure was published for comment in the Federal Register on April 15, 2026. The amendment, filed on May 26, 2026, supersedes the original proposal in full.

The exchange is amending its rules to permit 23x5 trading in equity securities and derivative securities. To support the longer schedule, EDGX is expanding its Pre-Opening Session and replacing the Early Trading Session with a new Overnight Trading Session, alongside operational and definitional changes intended to keep the market structure transparent and compliant with existing rules.

Implications for U.S. market access

The SEC says the amended proposal is consistent with the Securities Exchange Act and the regulatory framework that applies to national securities exchanges. The regulator says the longer trading window may improve efficiency and accessibility by aligning more closely with global trading patterns.

For EDGX, the extended schedule is aimed at capturing stronger participation from international investors seeking access to U.S. securities during their local business hours. The exchange argues that the model can broaden market accessibility, aid portfolio management and support capital formation as trading demand becomes more global.

Our earlier coverage of the SEC’s proposal to rescind its 2024 climate disclosure rule explained that the requirement never took effect due to ongoing litigation and is now facing a formal rollback process with a public comment period. We noted the split between business groups backing the reversal and investor advocates warning it could reduce transparency, while some companies may still need to comply with separate climate-reporting regimes in places like California and the EU.

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