Effects of Conditional Oil Volatility on Exchange Rate and Stock Markets Returns


  • Tarek Bouazizi University of Tunis El Manar, Tunis, Tunisia,
  • Fatma Mrad Faculty of Economics and Management of Sousse, Sousse, Tunisia,
  • Arafet Hamida Higher Institute of Management of Gabès, Tunisia
  • Sawsen Nafti Faculty of Economics and Management of Sousse, Tunisia




The underlying volatility at a given time is called conditional volatility at this particular time and is modeled by various ARMA-GARCH conditional variance equations (GARCH, EGARCH, GJR, APARCH, IGARCH). How important are oil price fluctuations and oil price volatility in foreign exchange markets and stock markets? What is the nature of the relationship between these three markets? What are the political implications if volatility, using appropriate models to determine, turns out to be important? We evaluate these questions empirically, using the specification of Narayan and Narayan (2010). This specification, in our paper, deals with the determination of volatility appropriate models, based on information criteria, of the ARMA-ARCH family conditional volatility of oil returns using daily data for each country independently (i), and revolve around an analysis of the effect of the volatility of black gold price on the returns of the other two markets in Oil Importing Developed Countries category (ii). The selection of appropriate models of oil returns according to the period of the chosen data gives the ARMA(2,2)- GJR(1,2) model for the Germany and the ARMA(2,2)-GJR(2,2) model for the Japan and the USA. The results that the conditional variances of oil returns, foreign exchange market returns and stock market returns are contested and they have a long-term relationship in different countries. In addition, the results of the granger causality tests and the study of impulse response functions have shown that it has a sending effect of the volatility of oil prices on most foreign exchange markets and stock markets, highlighting the strong explanatory power of market volatility, but bidirectional causality is not always present. Our empirical results involved in the prevention of shocks are important for policymakers, for portfolio managers seeking optimal portfolio allocation, for monetary authorities who are studying changes in the exchange rate of the national currency against currencies, for oil-importing countries seeking to minimize their spending on crude oil, and for oil-exporting countries seeking the sound management of oil reserves. They also show that the volatility of crude oil prices on the world market is generally more significant for foreign exchange and stock markets than the volatility of oil price in the local market. This main conclusion gives political implications to policymakers.


ARMA-GARCH, Conditional Volatility, Oil price, Exchange Rate, Stock Market


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How to Cite

Bouazizi, T., Mrad, F., Hamida, A., & Nafti, S. (2022). Effects of Conditional Oil Volatility on Exchange Rate and Stock Markets Returns. International Journal of Energy Economics and Policy, 12(2), 53–71. https://doi.org/10.32479/ijeep.12826