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Time Stamp Errors and the Stock Price Reaction to Analyst Recommendation and Forecast Revisions

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  • Hoechle, Daniel
  • Schaub, nic
  • Schmid, Markus

Abstract

This paper investigates the problem of time stamp errors in the IBES database, the most important data provider of analyst recommendations and forecasts currently. We compare IBES to alternative data sources and show that IBES announcement dates of both recommendations and forecasts are systematically delayed. As a consequence, announcement returns in IBES are significantly underestimated while the pre-announcement effect, which often includes the effective announcement date, is overestimated. We also show that time stamp errors in IBES differ significantly in the cross-section, driving some of the cross-sectional differences in announcement returns. Finally, we discuss how existing research is affected by time stamp errors.

Suggested Citation

  • Hoechle, Daniel & Schaub, nic & Schmid, Markus, 2012. "Time Stamp Errors and the Stock Price Reaction to Analyst Recommendation and Forecast Revisions," Working Papers on Finance 1215, University of St. Gallen, School of Finance, revised Sep 2015.
    • Handle: RePEc:usg:sfwpfi:2012:15
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    File URL: http://ux-tauri.unisg.ch/RePEc/usg/sfwpfi/WPF-1215.pdf
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    References listed on IDEAS

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    Cited by:

    1. Galanti, Sébastien, 2016. "Archival data of financial analysts' earnings forecasts in the euro zone: Problems with euro conversions," Research in International Business and Finance, Elsevier, vol. 38(C), pages 466-473.
    2. Hirshleifer, David & Levi, Yaron & Lourie, Ben & Teoh, Siew Hong, 2019. "Decision fatigue and heuristic analyst forecasts," Journal of Financial Economics, Elsevier, vol. 133(1), pages 83-98.
    3. Miwa, Kotaro, 2023. "How quickly do investors react to analyst reports? Evidence from reports released outside trading hours," Global Finance Journal, Elsevier, vol. 57(C).
    4. Jiang, Hao & Li, Sophia Zhengzi & Wang, Hao, 2021. "Pervasive underreaction: Evidence from high-frequency data," Journal of Financial Economics, Elsevier, vol. 141(2), pages 573-599.
    5. Karmaziene, Egle, 2023. "The greater the volume, the greater the analyst," Finance Research Letters, Elsevier, vol. 51(C).
    6. Lin, Tse-Chun & Lu, Xiaolong, 2015. "Why do options prices predict stock returns? Evidence from analyst tipping," Journal of Banking & Finance, Elsevier, vol. 52(C), pages 17-28.

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    More about this item

    Keywords

    time stamp errors; IBES database; analyst recommendations; analyst forecasts; stock price reaction; pre-announcement effect.;
    All these keywords.

    JEL classification:

    • G14 - Financial Economics - - General Financial Markets - - - Information and Market Efficiency; Event Studies; Insider Trading
    • G24 - Financial Economics - - Financial Institutions and Services - - - Investment Banking; Venture Capital; Brokerage
    • G29 - Financial Economics - - Financial Institutions and Services - - - Other

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