Contagion effects in the electric utility industry following the Fukushima nuclear accident

Houdou Basse Mama and Alexander Bassen

Applied Economics, 2013, vol. 45, issue 24, 3421-3430

Abstract: This article examines intra-industry information transfers in the European and Japanese electric industry in the wake of the Fukushima nuclear accident. For European conventional utilities, the downward price drift is relatively small and transient in nature. Yet, we find positive and lingering effects of the accident on the shares of alternative electric utilities. Japanese utilities were hit the hardest and the shock seems to be long-lasting. An interesting finding of this article is the abrupt increase (decrease) in the systematic risk of conventional (alternative) electric utilities following the event. In Europe, we could only document a decrease in the idiosyncratic risk of conventional utilities, pointing to enhanced return synchronicity in the conventional power industry. In turn, total risk seems to be stationary around the accident. In rebuttal, idiosyncratic and systematic risks (and consequently total risk) have substantially risen in Japan since the event. Finally, intercept values related to European utilities remained stable around the accident while Japanese utilities incurred a substantial decline in their daily average returns as captured by alpha shifts.

Date: 2013
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DOI: 10.1080/00036846.2012.714072

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