Publication detail

Kristoufek, L. & Lunackova, P.: Long-term memory in electricity prices: Czech market evidence

Author(s): prof. PhDr. Ladislav Krištoufek Ph.D.,
PhDr. Petra Luňáčková Ph.D.,
Type: Articles in journals with impact factor
Year: 2013
Number: 0
ISSN / ISBN:
Published in: Czech Journal of Economics and Finance 63(5), pp. 407-424 arXiv PDF
Publishing place:
Keywords: electricity, Hurst exponent, persistence, cycles
JEL codes:
Suggested Citation:
Abstract: We analyze the long-term memory properties of hourly prices of electricity in the Czech Republic between 2009 and 2012. Various statistical properties of these prices are studied, and as the dynamics of electricity prices is dominated by cycles—in particular intraday and daily—we opt for detrended fluctuation analysis, which is well suited to such specific series. We find that electricity prices are non-stationary but strongly mean-reverting, which distinguishes them from prices of other financial assets, which are usually characterized as unit root series. Such behavior is attributed to specific features of electricity, in particular its non-storability. Additionally, we argue that the rapid mean-reversion is due to the principles of electricity spot prices. These properties are shown to be stable across all the years studied.
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