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The Interval Effect in Estimating Beta: Empirical Evidence from the Romanian Stock Market

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  • Dragos Stefan Oprea

Abstract

This study presents empirical evidence regarding the interval e¤ect in estimation of beta coeffcients for stocks listed on the Bucharest Stock Exchange. Employing the standard market model, this paper finds that beta estimates for the same stock differs considerably when daily and monthly returns are used. Further, using a linear regression model, this paper shows that the differences between monthly and daily beta estimates are negatively ces to some characteristics of stock, like market capitalization and trading intensity.

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  • Dragos Stefan Oprea, 2015. "The Interval Effect in Estimating Beta: Empirical Evidence from the Romanian Stock Market," The Review of Finance and Banking, Academia de Studii Economice din Bucuresti, Romania / Facultatea de Finante, Asigurari, Banci si Burse de Valori / Catedra de Finante, vol. 7(2), pages 016-025, December.
  • Handle: RePEc:rfb:journl:v:07:y:2015:i:2:p:016-025
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    11. Brailsford, Timothy J. & Josev, Thomas, 1997. "The impact of the return interval on the estimation of systematic risk," Pacific-Basin Finance Journal, Elsevier, vol. 5(3), pages 357-376, July.
    12. Bartholdy, Jan & Peare, Paula, 2005. "Estimation of expected return: CAPM vs. Fama and French," International Review of Financial Analysis, Elsevier, vol. 14(4), pages 407-427.
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