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Are clean energy stocks efficient? Asymmetric multifractal scaling behaviour

Jawad Hussain Shahzad, Syed, Bouri, Elie, Mujtaba, Ghulam ORCID logoORCID: https://orcid.org/0000-0002-7317-4357, Muhammad Nasir, Rana and Kristoufek, Ladislav (2020) Are clean energy stocks efficient? Asymmetric multifractal scaling behaviour. Physica A: Statistical Mechanics and its Applications, 550 (124519).

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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.

Item Type: Article
Status: Published
DOI: 10.1016/j.physa.2020.124519
School/Department: London Campus
URI: https://ray.yorksj.ac.uk/id/eprint/10044

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