Cyber Attacks, Spillovers and Contagion in the Cryptocurrency Markets

33 Pages Posted: 5 Jun 2020

See all articles by Guglielmo Maria Caporale

Guglielmo Maria Caporale

Brunel University London - Department of Economics and Finance; London South Bank University; CESifo (Center for Economic Studies and Ifo Institute); German Institute for Economic Research (DIW Berlin)

Woo-Young Kang

Brunel University London - Department of Economics and Finance

Fabio Spagnolo

Brunel University London - Economics and Finance

Nicola Spagnolo

Brunel University London - Economics and Finance

Date Written: 2020

Abstract

This paper examines mean and volatility spillovers between three major cryptocurrencies (Bitcoin, Litecoin and Ethereum) and the role played by cyber attacks. Specifically, trivariate GARCH-BEKK models are estimated which include suitably defined dummies corresponding to different types, targets and number per day of cyber attacks. Significant dynamic linkages (interdependence) among the three cryptocurrencies under investigation are found in most cases when cyber attacks are taken into account, Bitcoin appearing to be the dominant one. Further, Wald tests for parameter shifts during episodes of turbulence resulting from cyber attacks provide evidence that the latter affect the transmission mechanism between cryptocurrency returns and volatilities (contagion). More precisely, cyber attacks appear to strengthen cross-market linkages, thereby reducing portfolio diversification opportunities for cryptocurrency investors. Finally, the conditional correlation analysis confirms the previous findings.

Keywords: mean and volatility spillovers, contagion, cryptocurrencies, cyber attacks

JEL Classification: C320, F300, G150

Suggested Citation

Caporale, Guglielmo Maria and Kang, Woo-Young and Spagnolo, Fabio and Spagnolo, Nicola, Cyber Attacks, Spillovers and Contagion in the Cryptocurrency Markets (2020). CESifo Working Paper No. 8324, Available at SSRN: https://ssrn.com/abstract=3618849

Guglielmo Maria Caporale (Contact Author)

Brunel University London - Department of Economics and Finance ( email )

Kingston Lane
Marie Jahoda Building
Uxbridge, Middlesex UB8 3PH
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+44 1895 266713 (Phone)
+44 1895 269770 (Fax)

HOME PAGE: http://www.brunel.ac.uk/about/acad/bbs/bbsstaff/ef_staff/guglielmocaporale/

London South Bank University ( email )

Centre for Monetary and Financial Economics
London
United Kingdom

CESifo (Center for Economic Studies and Ifo Institute)

Poschinger Str. 5
Munich, DE-81679
Germany

German Institute for Economic Research (DIW Berlin) ( email )

Mohrenstraße 58
Berlin, 10117
Germany

Woo-Young Kang

Brunel University London - Department of Economics and Finance ( email )

Kingston Lane
Uxbridge, Middlesex UB8 3PH
United Kingdom

Fabio Spagnolo

Brunel University London - Economics and Finance ( email )

Uxbridge UB8 3PH
United Kingdom
+44 1895 816383 (Phone)
+44 1895 203303 (Fax)

HOME PAGE: http://www.brunel.ac.uk/depts/ecf/Staff/SpagnoloF/Main.htm

Nicola Spagnolo

Brunel University London - Economics and Finance ( email )

Uxbridge UB8 3PH
United Kingdom

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