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Market Microstructure · Behavioural Finance·2026·Research Note

Overnight Price Jumps and Short-Term Return Predictability

Market overreaction, price discovery, and trading implications in U.S. equities.

AuthorPaolo d'Ascenzi
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This research note studies overnight price jumps in U.S. equities, their short-term reversal, the evidence across crisis periods and firm characteristics, the horizon at which the effect disappears, and the implications of the move toward 23-hour trading.

The original document is available in English as a Microsoft Word file and is signed by Paolo d'Ascenzi.

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This research is provided for educational and informational purposes only. It does not constitute investment advice, a recommendation, or an offer to buy or sell any financial instrument.