2020/09/11 by María Belén Arouxét, Arouxet, M. Belén, Aurelio F. Bariviera +5
Economics, Econometrics and Finance · #60G22 #60G35 #65T60 #Complex Systems and Time Series Analysis #FOS: Economics and business #Financial Risk and Volatility Modeling #G.3 #Market Dynamics and Volatility #Statistical Finance (q-fin.ST)
paper · pdf · doi:10.48550/arxiv.2009.05652
openalex publication_date 2020/09/11 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Cryptocurrency history begins in 2008 as a means of payment proposal. However, cryptocurrencies evolved into complex, high yield speculative assets. Contrary to traditional financial instruments, they are not (mostly) traded in organized, law-abiding venues, but on online platforms, where anonymity reigns. This paper examines the long term memory in return and volatility, using high frequency time series of eleven important coins. Our study covers the pre-Covid-19 and the subsequent pandemia period. We use a recently developed method, based on the wavelet transform, which provides more robust estimators of the Hurst exponent. We detect that, during the peak of Covid-19 pandemic (around March 2020), the long memory of returns was only mildly affected. However, volatility suffered a temporary impact in its long range correlation structure. Our results could be of interest for both academics and practitioners.