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Do shocks to G7 stock prices have a permanent effect?

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  • Narayan, Paresh Kumar

Abstract

There is a plethora of studies that investigate evidence for the behaviour of stock prices using univariate techniques for unit roots. Whether or not stock prices are characterised by a unit root have implications for the efficient market hypothesis, which asserts that returns of a stock market are unpredictable from previous price changes. The extant literature has found mixed evidence on the integrational properties of stock prices. In this paper, for the first time, we provide evidence on the unit root hypothesis for G7 stock price indices using the Lagrangian multiplier panel unit root test that allows for structural breaks. Our main finding is that stock prices are stationary processes, inconsistent with the efficient market hypothesis.

Suggested Citation

  • Narayan, Paresh Kumar, 2008. "Do shocks to G7 stock prices have a permanent effect?," Mathematics and Computers in Simulation (MATCOM), Elsevier, vol. 77(4), pages 369-373.
  • Handle: RePEc:eee:matcom:v:77:y:2008:i:4:p:369-373
    DOI: 10.1016/j.matcom.2007.03.003
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    References listed on IDEAS

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    Cited by:

    1. Tülin Anlas & Cengiz Toraman, 2016. "Analysing the Efficiency of the Turkish Stock Market with Multiple Structural Breaks," International Journal of Academic Research in Business and Social Sciences, Human Resource Management Academic Research Society, International Journal of Academic Research in Business and Social Sciences, vol. 6(12), pages 721-740, December.
    2. Lee, Chien-Chiang & Lee, Jun-De & Lee, Chi-Chuan, 2010. "Stock prices and the efficient market hypothesis: Evidence from a panel stationary test with structural breaks," Japan and the World Economy, Elsevier, vol. 22(1), pages 49-58, January.
    3. Gozbasi, Onur & Kucukkaplan, Ilhan & Nazlioglu, Saban, 2014. "Re-examining the Turkish stock market efficiency: Evidence from nonlinear unit root tests," Economic Modelling, Elsevier, vol. 38(C), pages 381-384.

    More about this item

    Keywords

    Stock prices; Efficient market hypothesis; Lagrangian multiplier panel unit root test;

    JEL classification:

    • C22 - Mathematical and Quantitative Methods - - Single Equation Models; Single Variables - - - Time-Series Models; Dynamic Quantile Regressions; Dynamic Treatment Effect Models; Diffusion Processes
    • G14 - Financial Economics - - General Financial Markets - - - Information and Market Efficiency; Event Studies; Insider Trading
    • G15 - Financial Economics - - General Financial Markets - - - International Financial Markets

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