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Level of efficiency in the UK equity market: empirical study of the effects of the global financial crisis

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  • Taufiq Choudhry
  • Ranadeva Jayasekera

Abstract

This paper investigates the effect of good or bad news (the asymmetric effect) on the time-varying beta of firms in the UK during good periods (booms) and bad periods (recessions). Daily data from twenty five UK firms of different sizes and from different industries are applied in the empirical tests. The data ranges from 2004 to 2010, which includes the current global financial crisis. The time-varying betas are created by means of the bivariate BEKK GARCH model, and then linear regressions are applied to test for the asymmetric effect of news on the beta. The asymmetric effects are investigated based on both market and non-market shocks. Most firms and industries seem to support the market efficiency hypothesis during both periods. However, the level of market efficiency seems to decline significantly from the pre-crisis to crisis period. Both the results of market efficiency and declining market efficiency from the pre-crisis to crisis periods provide ample evidence of the asymmetric effect of the financial crisis on the beta of UK firms. Copyright Springer Science+Business Media New York 2015

Suggested Citation

  • Taufiq Choudhry & Ranadeva Jayasekera, 2015. "Level of efficiency in the UK equity market: empirical study of the effects of the global financial crisis," Review of Quantitative Finance and Accounting, Springer, vol. 44(2), pages 213-242, February.
    • Handle: RePEc:kap:rqfnac:v:44:y:2015:i:2:p:213-242
    DOI: 10.1007/s11156-013-0404-6
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    More about this item

    Keywords

    Asymmetric effect; Time-varying beta; BEKK; Market efficiency; Asset mispricing; G1; G12;
    All these keywords.

    JEL classification:

    • G1 - Financial Economics - - General Financial Markets
    • G12 - Financial Economics - - General Financial Markets - - - Asset Pricing; Trading Volume; Bond Interest Rates

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