Cristina Palma – Polytechnic Institute of Setúbal, School of Business and Administration, Setúbal, Portugal
Rui Dias – ISG – Business & Economics School, CIGEST, Lisbon, Portugal; ESCAD – Polytechnic Institute of Lusophony, Lisbon, Portugal
Rosa Galvão – Polytechnic Institute of Setúbal, School of Business and Administration, Setúbal, Portugal
Paulo Alexandre – Polytechnic Institute of Setúbal, School of Business and Administration, Setúbal, Portugal
Sidalina Gonçalves – Polytechnic Institute of Setúbal, School of Business and Administration, Setúbal, Portugal
Keywords:
Cryptocurrencies;
Efficiency;
Long memories;
DFA;
Arbitrage
Abstract: The primary purpose of this study is to compare the levels of efficiency between the Islamic cryptocurrency (HelloGold), the ecological cryptocurrencies Cardano (ADA) and Stellar (XLM) and the traditional digital currencies Bitcoin (BTC) and Ethereum (ETH) over the period from 24 February 2022 to 28 January 2024. Analysing the DFA exponents reveals different types of memory in the digital currencies time series. The Islamic digital currency HelloGold (HGT) exhibits short-term memory, suggesting profit opportunities based on recent trends. In contrast, the green cryptocurrency Cardano (ADA) shows long-term memory, indicating the influence of long-term events and trends on prices. The digital currency Stellar (XLM) does not show a clear short-term or long-term memory trend, making it difficult to predict future movements. Meanwhile, Bitcoin (BTC) and Ethereum (ETH) exhibit long-term memory, suggesting that their prices are affected by long-term trends. These results have important implications for investors and traders when adjusting their trading strategies according to the behaviour observed in cryptocurrency prices.

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8th International Scientific Conference – EMAN 2024 – Economics and Management: How to Cope With Disrupted Times, Rome, Italy, March 21, 2024, SELECTED PAPERS, published by: Association of Economists and Managers of the Balkans, Belgrade, Serbia; ISBN 978-86-80194-84-4, ISSN 2683-4510, DOI: https://doi.org/10.31410/EMAN.S.P.2024
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