A Time-Varying Network for Cryptocurrencies

• Published in: Journal of business & economic statistics Vol. 42; no. 2; pp. 437 - 456
• Main Authors: Guo, Li, Härdle, Wolfgang Karl, Tao, Yubo
• Format: Journal Article
• Language: English
• Published: Alexandria Taylor & Francis 02-04-2024; Taylor & Francis Ltd
• Subjects: Co-clustering; Community detection; Covariates; Dynamic stochastic blockmodel; Momentum; Network risk
• ISSN: 0735-0015; 1537-2707
• DOI: 10.1080/07350015.2022.2146695

Cryptocurrencies return cross-predictability and technological similarity yield information on risk propagation and market segmentation. To investigate these effects, we build a time-varying network for cryptocurrencies, based on the evolution of return cross-predictability and technological similarities. We develop a dynamic covariate-assisted spectral clustering method to consistently estimate the latent community structure of cryptocurrencies network that accounts for both sets of information. We demonstrate that investors can achieve better risk diversification by investing in cryptocurrencies from different communities. A cross-sectional portfolio that implements an inter-crypto momentum trading strategy earns a 1.08% daily return. By dissecting the portfolio returns on behavioral factors, we confirm that our results are not driven by behavioral mechanisms.