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All U.S. Equities Exchanges affiliated with Cboe have announced the upcoming implementation of separate Fat Finger Protection limit settings for non-Regular Trading Hours (non-RTH) trading sessions. The new risk controls are scheduled to officially take effect on October 26, 2026, creating distinct parameters for pre-market and post-market trading activities.
Trading liquidity outside regular market hours is typically significantly thinner, making order books far more susceptible to erratic price movements caused by accidental large orders or algorithmic pricing errors. By introducing specialized protections tailored to extended hours, Cboe aims to prevent severe market disruptions and bolster market integrity during illiquid trading windows.
Institutional and retail traders operating in extended sessions should review these upcoming regulatory parameters to align their automated trading systems and execution strategies. Enhanced safeguards during non-RTH sessions provide greater stability for international market participants, including Gulf-based traders who actively trade U.S. equities during extended market hours.
