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The impact of stock spams on volatility

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  • Taoufik Bouraoui

Abstract

This paper is dedicated to study the impact of stock spams through the analysis of the variations of volatility. We use the methodology of event studies on a sample of hundred ten firms. The results show positive and significant changes in volatility during 12 days of the event window; a widening of the variation [lowest price - highest price] was noticed following the consignment of messages by the spammers. The sending of stock spams affected the behaviour of investors, indicating thus that the spamming activity is a lucrative business.

Suggested Citation

  • Taoufik Bouraoui, 2009. "The impact of stock spams on volatility," EconomiX Working Papers 2009-30, University of Paris Nanterre, EconomiX.
    • Handle: RePEc:drm:wpaper:2009-30
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    References listed on IDEAS

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    1. Pindyck, Robert S, 1984. "Risk, Inflation, and the Stock Market," American Economic Review, American Economic Association, vol. 74(3), pages 335-351, June.
    2. Parkinson, Michael, 1980. "The Extreme Value Method for Estimating the Variance of the Rate of Return," The Journal of Business, University of Chicago Press, vol. 53(1), pages 61-65, January.
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    9. repec:dau:papers:123456789/9849 is not listed on IDEAS
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    As found by EconAcademics.org, the blog aggregator for Economics research:
    1. Stock spams work
      by Economic Logician in Economic Logic on 2009-10-19 19:50:00

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    Cited by:

    1. ap Gwilym, O. & Kita, A. & Wang, Q., 2014. "Speculate against speculative demand," International Review of Financial Analysis, Elsevier, vol. 34(C), pages 212-221.
    2. Taoufik Bouraoui, 2015. "The effect of reducing quantitative easing on emerging markets," Applied Economics, Taylor & Francis Journals, vol. 47(15), pages 1562-1573, March.

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    More about this item

    Keywords

    Stock spam; event studies; volatility; penny stock;
    All these keywords.

    JEL classification:

    • G14 - Financial Economics - - General Financial Markets - - - Information and Market Efficiency; Event Studies; Insider Trading
    • D84 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Expectations; Speculations
    • C12 - Mathematical and Quantitative Methods - - Econometric and Statistical Methods and Methodology: General - - - Hypothesis Testing: General

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