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The day-of-the-week effect and conditional volatility: Sensitivity of error distributional assumptions

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  • Baker, H. Kent
  • Rahman, Abdul
  • Saadi, Samir

Abstract

We test for reliable evidence of the day-of-the-week effect on both the mean and volatility for the S&P/TSX Canadian return index. Unlike previous studies, we permit several specifications for the error distribution -- GARCH normal, Student's t, generalized error distribution, and double exponential distribution. Unlike other studies, we find that the day-of-the-week effect in both mean and conditional volatility is sensitive to the particular specification of the underlying distributions. We also find that using a regression analysis assuming a Student's t distribution is a better way to investigate this effect. Our evidence demonstrates the apparent fragility of previous empirical studies on calendar anomalies. Thus, our results serve as a warning that with financial data, the error distributional assumptions are critical to correctly identifying empirical regularities in the data.

Suggested Citation

  • Baker, H. Kent & Rahman, Abdul & Saadi, Samir, 2008. "The day-of-the-week effect and conditional volatility: Sensitivity of error distributional assumptions," Review of Financial Economics, Elsevier, vol. 17(4), pages 280-295, December.
  • Handle: RePEc:eee:revfin:v:17:y:2008:i:4:p:280-295
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    Cited by:

    1. P., Srinivasan & M., Kalaivani, 2013. "Day-of-the-Week Effects in the Indian stock market," MPRA Paper 46805, University Library of Munich, Germany.
    2. Farag, Hisham, 2013. "Price limit bands, asymmetric volatility and stock market anomalies: Evidence from emerging markets," Global Finance Journal, Elsevier, vol. 24(1), pages 85-97.
    3. Olga Loiseau-Aslanidi, 2011. "Determinants and Effectiveness of Foreign Exchange Market Intervention in Georgia," Emerging Markets Finance and Trade, Taylor & Francis Journals, vol. 47(4), pages 75-95, July.
    4. Charles, Amélie, 2010. "The day-of-the-week effects on the volatility: The role of the asymmetry," European Journal of Operational Research, Elsevier, vol. 202(1), pages 143-152, April.
    5. Weber Christoph S. & Nickol Philipp, 2016. "More on Calendar Effects on Islamic Stock Markets," Review of Middle East Economics and Finance, De Gruyter, vol. 12(1), pages 65-113, April.
    6. Olga Loiseau-Aslanidi, 2011. "Determinants and Effectiveness of Foreign Exchange Market Intervention in Georgia," Emerging Markets Finance and Trade, Taylor & Francis Journals, vol. 47(4), pages 75-95, July.

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