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Persistence of announcement effects on the intraday volatility of stock returns: evidence from individual data

Author

Listed:
  • Sylvie Lecarpentier-Moyal

  • Georges Prat

    (EconomiX - EconomiX - UPN - Université Paris Nanterre - CNRS - Centre National de la Recherche Scientifique)

  • Patricia Renou-Maissant
  • Remzi Uctum

    (EconomiX - EconomiX - UPN - Université Paris Nanterre - CNRS - Centre National de la Recherche Scientifique)

Abstract

We analyze the persistence effects in the empirical relationship between announcement releases and return volatilities of four major companies of the French stock market using high frequency data over the period 1995–1999. Besides its institutional stability, this sample period avoids the econometric difficulties inherent to simultaneous news arrivals. Our approach contributes to the relevant literature in that we focus on individual stock volatilities rather than indices, we distinguish firm-specific and macroeconomic announcements, and we endogenize both the durations of announcement effects and the response patterns of equity prices. We find that our individual volatilities are affected by a systematic market effect, calendar effects, announcements related to the firms’ macroeconomic environment and announcements related to the firms’ and their competitors’ strategic dealings and commercial outcomes. We find evidence that all volatility responses are gradual with persistence horizons ranging from one to three hours, revealing a significant degree of inefficiency of the French stock market over the period. This inefficiency can be viewed as a breeding ground for the implementation of more performant informational and trading systems that allowed markets to move towards more efficiency.
(This abstract was borrowed from another version of this item.)

Suggested Citation

  • Sylvie Lecarpentier-Moyal & Georges Prat & Patricia Renou-Maissant & Remzi Uctum, 2014. "Persistence of announcement effects on the intraday volatility of stock returns: evidence from individual data," Post-Print hal-01411783, HAL.
    • Handle: RePEc:hal:journl:hal-01411783
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    Cited by:

    1. is not listed on IDEAS
    2. Barbara Będowska-Sójka, 2013. "Macroeconomic News Effects on the Stock Markets in Intraday Data," Central European Journal of Economic Modelling and Econometrics, Central European Journal of Economic Modelling and Econometrics, vol. 5(4), pages 249-269, December.
    3. González-Pla, Francisco & Lovreta, Lidija, 2019. "Persistence in firm’s asset and equity volatility," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 535(C).
    4. repec:ipg:wpaper:2014-510 is not listed on IDEAS
    5. repec:ipg:wpaper:2014-604 is not listed on IDEAS
    6. repec:ipg:wpaper:2014-511 is not listed on IDEAS
    7. repec:ipg:wpaper:2014-531 is not listed on IDEAS

    More about this item

    JEL classification:

    • G14 - Financial Economics - - General Financial Markets - - - Information and Market Efficiency; Event Studies; Insider Trading
    • C22 - Mathematical and Quantitative Methods - - Single Equation Models; Single Variables - - - Time-Series Models; Dynamic Quantile Regressions; Dynamic Treatment Effect Models; Diffusion Processes
    • C58 - Mathematical and Quantitative Methods - - Econometric Modeling - - - Financial Econometrics

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