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Can Exposure to Tail Risk Explain Size, Book-to-Market, and Idiosyncratic Volatility Anomalies?

Author

Listed:
  • Sofiane Aboura

    (CEPN - Centre d'Economie de l'Université Paris Nord (ancienne affiliation) - UP13 - Université Paris 13 - CNRS - Centre National de la Recherche Scientifique)

  • Eser Arisoy

    (DRM - Dauphine Recherches en Management - Université Paris Dauphine-PSL - PSL - Université Paris sciences et lettres - CNRS - Centre National de la Recherche Scientifique)

Abstract

We examine the impact of aggregate tail risk on return dynamics of size, book-to-market ratio, and idiosyncratic volatility sorted portfolios. Using changes in VIX Tail Hedge Index (ΔVXTH) as a proxy for aggregate tail risk, and controlling for market, size, book-to-market, and aggregate volatility risk, we document significant portfolio return exposures to tail risk. In particular, portfolios that contain small, value and volatile stocks exhibit consistently positive and statistically significant tail risk betas, whereas portfolios of big, growth and non-volatile stocks exhibit negative tail risk betas. We posit that due to their positive tail risk exposures, tail risk-averse investors demand extra compensation to hold small, value, and high idiosyncratic volatility stocks. Our results offer a tail risk-based explanation to size, value, and idiosyncratic volatility anomalies.

Suggested Citation

  • Sofiane Aboura & Eser Arisoy, 2017. "Can Exposure to Tail Risk Explain Size, Book-to-Market, and Idiosyncratic Volatility Anomalies?," CEPN Working Papers hal-01529356, HAL.
    • Handle: RePEc:hal:cepnwp:hal-01529356
    DOI: 10.2139/ssrn.2832893
    Note: View the original document on HAL open archive server: https://hal.science/hal-01529356
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