Long-range Dependencies of Euronext Capital Markets: A Dynamic Detrended Analysis


Rui Dias – Escola Superior de Ciências Empresarias at Instituto Politécnico de Setúbal, Portugal and CEFAGE-UE, IIFA, University of Évora, Portugal

Paula Heliodoro – Escola Superior de Ciências Empresarias at Instituto Politécnico de Setúbal, Portugal

Hortense Santos – Escola Superior de Ciências Empresarias at Instituto Politécnico de Setúbal, Portugal

Ana Rita Farinha – Escola Superior de Ciências Empresarias at Instituto Politécnico de Setúbal, Portugal

Márcia C. Santos – Escola Superior de Ciências Empresarias at Instituto Politécnico de Setúbal, Portugal and Information Sciences and Technologies and Architecture Research Center (ISTAR-IUL) at Instituto Universitário de Lisboa (ISCTE-IUL), Portugal

Paulo Alexandre – Escola Superior de Ciências Empresarias at Instituto Politécnico de Setúbal, Portugal


Abstract: This paper aims to test efficiency, in its weak form, in the cap­ital markets of the Netherlands (AEX), Belgium (BEL 20), France (CAC 40), Ireland (ISEQ 20), Norway (OSEBX), Portugal (PSI 20), in the period from April 4, 2019 to April 1, 2021. The sample was partitioned into two sub­periods, the first and second wave of the global pandemic: April 4, 2019 to April 30, 2020; May 4, 2020 to April 1, 2021. To carry out this analysis, different approaches were undertaken to analyze whether: (i) Euron­ext’s stock markets have more significant long memories in the first or second wave of the global pandemic? The results show the presence of sharp long memories during the first wave of the global pandemic, par­ticularly in the stock indices OSEBX (0.67), PSI 20 (0.67), AEX (0.66), BEL 20 (0.64), CAC 40 (0.62), ISEQ 20 (0.61), which implies that the yields are au­tocorrelated in time and, there is a reversal of the average, in all indexes. Regarding the second wave of the global pandemic, we found that most Euronext stock markets don’t reject the random walk hypothesis, with the exception of the Norwegian (0.56) and Portugal (0.55) stock markets. These findings show that the impact of the Covid-19 pandemic was ac­centuated during the first wave, but from May 2020 the markets adjust­ed and showed balance. The authors believe that the results achieved will be a benefit to international investors seeking efficient diversifica­tion into their portfolios. 

Euronext stock markets; Long memories; Arbitrage; Portfolio diversification

DOI: https://doi.org/10.31410/ERAZ.S.P.2021.27

7th International Scientific ERAZ Conference – ERAZ 2021 – Selected Papers: KNOWLEDGE BASED SUSTAINABLE DEVELOPMENT,  Online/virtual, May 27, 2021

ERAZ Conference Selected Papers are published by: Association of Economists and Managers of the Balkans – Belgrade, Serbia

ERAZ conference partners: Faculty of Economics and Business, Mediterranean University, Montenegro; University of National and World Economy – Sofia, Bulgaria; Faculty of Commercial and Business Studies – Celje, Slovenia; AMBIS University, Prague – Czech Republic; Faculty of Applied Management, Economics and Finance – Belgrade, Serbia

ERAZ Conference 2021 Selected Papers ISBN 978-86-80194-47-9, ISSN 2683-5568, DOI: https://doi.org/10.31410/ERAZ.S.P.2021

Creative Commons Non Commercial CC BY-NC: This article is distributed under the terms of the Creative Commons Attribution-Non-Commercial 4.0 License (https://creativecommons.org/licenses/by-nc/4.0/) which permits non-commercial use, reproduction and distribution of the work without further permission. 


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