Abstract
This paper disentangles oil volatility risk to two components. The first component is attributed to crude oil, while the second is related to gasoline. This disentanglement serves the purpose of investigating the extent to which crude oil and gasoline are complementary in impacting return and variance residuals. The Realized-EGARCH model of Hansen et al. (J Appl Econom 29(5):774–799, 2014) is used to test the hypothesis that stock markets show some delay in incorporating oil information. This study shows that both crude oil- and gasoline-based information impact stock markets contemporaneously in a complementary fashion. Unlike the underreaction hypothesis, which is suggested as an explanation to the negative lagged effect of crude oil price change on return, the sequential information hypothesis explains better the ways information about oil is disseminated among U.S. industry portfolios.
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Notes
This is consistent with the underreaction hypothesis according to which investors exhibit conservatism bias, which is a tendency to underweight new information when updating prior beliefs (Barberis et al. 1998).
This is in line with the sequential information hypothesis, investors receive information signals at different trading times. As a result, prices are partially revealing at the start, but fully revealing when bits of information are integrated through continuous trading (Copeland 1976).
The hedge ratio shows the number of crude oil units that is protected in terms of the number of gasoline units.
I use monthly minimum and maximum volatilities, which has the disadvantage of being drawn from another distribution (extreme value distribution), but has the advantage of being generated by richer information dynamics, which are free from strong biases in intraday and interday bid-ask prices (Brandt and Jones 2006).
See Hansen et al. (2012) for the properties of these log-likelihood functions.
The crude oil spot prices are West Texas Intermediate (WTI) series, while the gasoline prices are a combination of New York Harbor (NYH) regular gasoline from June 2, 1986 to September 30, 2005 and reformulated RBOB regular gasoline series from October 3, 2005 to June 30, 2014.
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Acknowledgements
I am thankful for helpful comments from, the editor (Dr. C.-F. Lee), two anonymous referees, and participants in the 4th International Symposium on Energy and Finance Issues on March 24–26, 2016 in Paris. Special thanks to Dania Makki for proofing read the last version of the paper.
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Appendices
Appendix 1
See Table 8.
Appendix 2: Decomposition of the oil risk factor
Start with
Take the expected second moment of Eqs. (15) and (16).
Express the betas of Eqs. (17–20) in relative terms as
Standardize the covariance in terms of crude oil variance and simplify thereafter to obtain,
Standardize the covariance in terms of gasoline variance and simplify thereafter to obtain,
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Ben Sita, B. Crude oil and gasoline volatility risk into a Realized-EGARCH model. Rev Quant Finan Acc 53, 701–720 (2019). https://doi.org/10.1007/s11156-018-0763-0
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DOI: https://doi.org/10.1007/s11156-018-0763-0