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Remarks on the behaviour of financial market efficiency during the COVID-19 pandemic. The case of VIX

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  • DIMA, Bogdan
  • DIMA, Ştefana Maria
  • IOAN, Roxana

Abstract

This paper investigates the Chicago Board Option Exchange Volatility Index's (‘VIX’) response to the COVID-19 pandemic crisis, in terms of information efficiency. First, we estimate an Efficiency Index over rolling windows, based on closing levels, for a period between 1995-01-03 and 2020-12-30. Second, we check for the presence of deterministic chaos in efficiency series, by using the largest Lyapunov exponent and sample, as well as permutation entropy. However, we do not find that these estimators provide a clear evidence of a substantial change in VIX's efficiency during 2020, in terms of deterministic chaos and irregular dynamics.

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  • DIMA, Bogdan & DIMA, Ştefana Maria & IOAN, Roxana, 2021. "Remarks on the behaviour of financial market efficiency during the COVID-19 pandemic. The case of VIX," Finance Research Letters, Elsevier, vol. 43(C).
    • Handle: RePEc:eee:finlet:v:43:y:2021:i:c:s1544612321000489
    DOI: 10.1016/j.frl.2021.101967
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    5. Clement Moyo & Izunna Anyikwa & Andrew Phiri, 2023. "The Impact of Covid-19 on Oil Market Returns: Has Market Efficiency Being Violated?," International Journal of Energy Economics and Policy, Econjournals, vol. 13(1), pages 118-127, January.
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    More about this item

    Keywords

    COVID-19; efficiency; deterministic chaos; largest Lyapunov exponent; sample entropy; permutation entropy;
    All these keywords.

    JEL classification:

    • G14 - Financial Economics - - General Financial Markets - - - Information and Market Efficiency; Event Studies; Insider Trading
    • G15 - Financial Economics - - General Financial Markets - - - International Financial Markets
    • C45 - Mathematical and Quantitative Methods - - Econometric and Statistical Methods: Special Topics - - - Neural Networks and Related Topics
    • C49 - Mathematical and Quantitative Methods - - Econometric and Statistical Methods: Special Topics - - - Other

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