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Open AccessArticle

Examination of the Spillover Effects among Natural Gas and Wholesale Electricity Markets Using Their Futures with Different Maturities and Spot Prices

1
The Kansai Electric Power Company Incorporated, Osaka 530-8270, Japan
2
Graduate School of Economics, Kobe University, Kobe 657-8501, Japan
3
Shinsei Bank, Limited, Tokyo 103-8303, Japan
*
Author to whom correspondence should be addressed.
Energies 2020, 13(7), 1533; https://doi.org/10.3390/en13071533
Received: 22 February 2020 / Revised: 23 March 2020 / Accepted: 23 March 2020 / Published: 25 March 2020
(This article belongs to the Special Issue Empirical Analysis of Natural Gas Markets)
This study measures the connectedness of natural gas and electricity spot returns to their futures returns with different maturities. We employ the Henry Hub and the Pennsylvania, New Jersey, and Maryland (PJM) Western Hub Peak as the natural gas price indicator and the wholesale electricity price indicator, respectively. We also use each commodity’s spot prices and 12 types of futures prices with one to twelve months maturities and realize results in fourfold. First, we observe mutual spillover effects between natural gas futures returns and learn that the natural gas futures market is integrated. Second, we observe the spillover effects from natural gas futures returns to natural gas spot returns (however, the same is not evident for natural gas spot returns to natural gas futures returns). We find that futures markets have better natural gas price discovery capabilities than spot markets. Third, we observe the spillover effects from natural gas spot returns to electricity spot returns, and the spillover effects from natural gas futures returns to electricity futures returns. We learn that the marginal cost of power generation (natural gas prices) is passed through to electricity prices. Finally, we do not observe any spillover effects amongst electricity futures returns, except for some combinations, and learn that the electricity futures market is not integrated. View Full-Text
Keywords: spillover effect; natural gas; electricity; spot; futures spillover effect; natural gas; electricity; spot; futures
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Nakajima, T.; Toyoshima, Y. Examination of the Spillover Effects among Natural Gas and Wholesale Electricity Markets Using Their Futures with Different Maturities and Spot Prices. Energies 2020, 13, 1533.

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