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Modeling Stock Market Returns under Self-exciting Threshold Autoregressive Model: Evidence from West Africa

Author

Listed:
  • Emmanuel Numapau Gyamfi

    (Department of Statistics, University of Venda, South Africa,)

  • Kwabena A. Kyei

    (Department of Statistics, University of Venda, South Africa.)

Abstract

The study seeks to investigate whether non-linear patterns are present in the returns of two indices on the stock markets in Ghana and Nigeria between the period of 2011 and 2015. The results of applying four linearity tests on the returns concluded that the null of linearity is rejected on all four tests for the Ghanaian index but mixed for the Nigerian index. We modelled the indices under the non-linear self-exciting threshold autoregressive (SETAR) model. We compared the modelling performance of the non-linear SETAR model with that of the standard AR (1) and AR (2) by analyzing Akaike information criterion values of the respective models. Our results show that the SETAR model fits the data well. Hence, modelling stock market returns from Ghana and Nigeria using linear models might lead to spurious conclusions.

Suggested Citation

  • Emmanuel Numapau Gyamfi & Kwabena A. Kyei, 2016. "Modeling Stock Market Returns under Self-exciting Threshold Autoregressive Model: Evidence from West Africa," International Journal of Economics and Financial Issues, Econjournals, vol. 6(3), pages 1194-1199.
    • Handle: RePEc:eco:journ1:2016-03-49
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    References listed on IDEAS

    as
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    Cited by:

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    More about this item

    Keywords

    Threshold Models; Linearity Tests; Self-exciting Threshold Autoregressive Model;
    All these keywords.

    JEL classification:

    • C12 - Mathematical and Quantitative Methods - - Econometric and Statistical Methods and Methodology: General - - - Hypothesis Testing: General
    • C13 - Mathematical and Quantitative Methods - - Econometric and Statistical Methods and Methodology: General - - - Estimation: General
    • C24 - Mathematical and Quantitative Methods - - Single Equation Models; Single Variables - - - Truncated and Censored Models; Switching Regression Models; Threshold Regression Models

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