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Is CAPM a Behavioral Model? Estimating Sentiments from Rationalism

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  • Nicholas Apergis
  • Mobeen Ur Rehman

Abstract

The authors investigate the role of investor sentiment in asset pricing. In particular, they explore whether this investor sentiment has the ability to be predicted by the residuals from the capital asset pricing model (CAPM). The analysis makes use of data for S&P500 firms on a daily basis, spanning the period of 1995–2015, as well as certain panel methodological approaches. The results suggest that the residuals from the CAPM model gain explanatory power for investor sentiment. In other words, investor sentiment is a priced factor. The implication of this finding is that overlooking the role of investor sentiment in classical finance theory could lead to an imperfect picture of describing the asset pricing.

Suggested Citation

  • Nicholas Apergis & Mobeen Ur Rehman, 2018. "Is CAPM a Behavioral Model? Estimating Sentiments from Rationalism," Journal of Behavioral Finance, Taylor & Francis Journals, vol. 19(4), pages 442-449, October.
    • Handle: RePEc:taf:hbhfxx:v:19:y:2018:i:4:p:442-449
    DOI: 10.1080/15427560.2018.1431885
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    Cited by:

    1. Zeitun, Rami & Rehman, Mobeen Ur & Ahmad, Nasir & Vo, Xuan Vinh, 2023. "The impact of Twitter-based sentiment on US sectoral returns," The North American Journal of Economics and Finance, Elsevier, vol. 64(C).
    2. Narayan, Seema & Rehman, Mobeen Ur, 2021. "Can home-biased investors diversify interregionally in the long run?," Economic Modelling, Elsevier, vol. 97(C), pages 167-181.
    3. Rehman, Mobeen Ur & Sensoy, Ahmet & Eraslan, Veysel & Shahzad, Syed Jawad Hussain & Vo, Xuan Vinh, 2021. "Sensitivity of US equity returns to economic policy uncertainty and investor sentiments," The North American Journal of Economics and Finance, Elsevier, vol. 57(C).
    4. Alomari, Mohammad & Al Rababa’a, Abdel Razzaq & El-Nader, Ghaith & Alkhataybeh, Ahmad & Ur Rehman, Mobeen, 2021. "Examining the effects of news and media sentiments on volatility and correlation: Evidence from the UK," The Quarterly Review of Economics and Finance, Elsevier, vol. 82(C), pages 280-297.

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