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Are clean energy stocks efficient? Asymmetric multifractal scaling behaviour

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  • Shahzad, Syed Jawad Hussain
  • Bouri, Elie
  • Kayani, Ghulam Mujtaba
  • Nasir, Rana Muhammad
  • Kristoufek, Ladislav

Abstract

We examine the multifractal scaling behaviour and weak form market efficiency of clean energy stock indices using an asymmetric MF-DFA. We find asymmetric multifractality in the US, European, and global clean energy stock indices. Asymmetric multifractality in the clean energy stock index of the US is due to fat-tails and long-range correlation. However, for European and global clean stocks, multifractality is due only to fat-tailed distribution. We find higher efficiency in the upward trend of the European and global clean stock markets whereas, for the US, the market is less efficient when the market is upward trending. The time-varying market deficiency measure shows that US clean energy stocks are becoming relatively more efficient over time.

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  • Shahzad, Syed Jawad Hussain & Bouri, Elie & Kayani, Ghulam Mujtaba & Nasir, Rana Muhammad & Kristoufek, Ladislav, 2020. "Are clean energy stocks efficient? Asymmetric multifractal scaling behaviour," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 550(C).
    • Handle: RePEc:eee:phsmap:v:550:y:2020:i:c:s037843712030234x
    DOI: 10.1016/j.physa.2020.124519
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    9. Rehman, Mobeen Ur & Nautiyal, Neeraj & Ghardallou, Wafa & Vo, Xuan Vinh & Zeitun, Rami, 2023. "Comovement and spillover among energy markets: A Comparison across different crisis periods," Economic Analysis and Policy, Elsevier, vol. 79(C), pages 277-302.
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    17. Hanif, Waqas & Arreola Hernandez, Jose & Mensi, Walid & Kang, Sang Hoon & Uddin, Gazi Salah & Yoon, Seong-Min, 2021. "Nonlinear dependence and connectedness between clean/renewable energy sector equity and European emission allowance prices," Energy Economics, Elsevier, vol. 101(C).
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    19. Sharma, Gagan Deep & Verma, Mahesh & Shahbaz, Muhammad & Gupta, Mansi & Chopra, Ritika, 2022. "Transitioning green finance from theory to practice for renewable energy development," Renewable Energy, Elsevier, vol. 195(C), pages 554-565.

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    More about this item

    Keywords

    Clean energy stocks; Long memory; Efficiency; MF-DFA;
    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

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