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Detecting multiple-equilibria and chaos in oil prices and global commodity markets

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  • Ata Ozkaya

    (Assoc.Professor, Department of Economics, Galatasaray University, Çiragan Cad., No: 36, Ortaköy, 34647, Istanbul, Turkey)

Abstract

In the past 20 years, commodity markets have been examined under the hypothesis of whether the prices exhibit recurrent patterns or follow the stochastic processes. In this study, we analyze both global energy markets and food markets to detect the presence of multiple equilibria, which may lead to higher spikes in prices and to the occurrence of intermittency. This study focuses on daily prices in Brent petrol and Natural gas markets from 23 May 2017 to 23 May 2022. This time interval covers the period where extraordinary economic and financial policies have been preferred in countries worldwide amid the Covid-19 pandemic crisis. On the other hand, the study investigates global Food index monthly data from 2007M11 to 2022M4. Similarly, the time interval under examination points out the effects of the 2008 global crisis where expansionary monetary policies have been implemented both by the Federal Reserve of the U.S and the European Central Bank. We employed the phase-space reconstruction method for the Crude oil Brent Europe and spot Natural gas prices series, and global Food index data respectively. The main findings of the study demonstrate that commodity markets do not converge to a unique equilibrium level, instead multiple equilibria persist and chaotic behavior occurs. The presence of multiple equilibria leads to an increase in complexity and recurrently causes volatility in commodity markets, which may have spillover effects on other financial markets. Our results suggest that these effects simultaneously increase global inflationary pressures. From the perspective of policy making, it is crucial to establish a strategy to eliminate multiple equilibria and prevent high price spikes. Our findings have important implications for Central bank policies in emerging markets and portfolio and risk management. Key Words:multiple equilibria, intermittency, oil prices, food index, natural gas prices, chaos, market efficiency

Suggested Citation

  • Ata Ozkaya, 2022. "Detecting multiple-equilibria and chaos in oil prices and global commodity markets," International Journal of Research in Business and Social Science (2147-4478), Center for the Strategic Studies in Business and Finance, vol. 11(6), pages 350-361, September.
    • Handle: RePEc:rbs:ijbrss:v:11:y:2022:i:6:p:350-361
    DOI: 10.20525/ijrbs.v11i6.1919
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    References listed on IDEAS

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