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Volatility spillovers across sectors and their magnitude: A sector-based analysis for Australia

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  • Duc Hong Vo

Abstract

While spillover across equity markets has been extensively investigated, volatility spillover across sectors has largely been under-examined in the current literature. This paper estimates the sectoral volatility using the ARMA-GARCH model and its spillover across Australian sectors on the VAR framework during the 2010–2021 period. We then identify breakpoints in market volatility during the Covid-19 pandemic using a wavelet methodology. We find that volatility spillover across Australian sectors is very significant at 60 per cent from 2010 to 2019, reaching 90 per cent during the Covid-19 pandemic in 2020. The spillover then reverts to its pre-pandemic level in 2021. Consumer Staples and Industrials are the significant risk transmitters, whereas Financials and Real estates are the most significant risk absorbers. Our findings also indicate that Real Estate, Health Care, and Financials record the most significant increase in volatility of more than 300 per cent. Policy implications regarding risk management across Australian sectors have emerged, particularly during extreme events such as the pandemic.

Suggested Citation

  • Duc Hong Vo, 2023. "Volatility spillovers across sectors and their magnitude: A sector-based analysis for Australia," PLOS ONE, Public Library of Science, vol. 18(6), pages 1-18, June.
    • Handle: RePEc:plo:pone00:0286528
    DOI: 10.1371/journal.pone.0286528
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    2. Kim, Dong-Jun & Noh, Eunjung & Choi, Sun-Yong, 2025. "Quantile spillover effects and sector dynamics in U.S. stock markets: Normal vs. extreme market conditions," Finance Research Letters, Elsevier, vol. 83(C).
    3. Jesús Enrique Molina-Muñoz & Pilar Soriano-Felipe, 2026. "Dynamic spillovers among policy uncertainty, financial markets and energy markets in developed and emerging economies," Economic Change and Restructuring, Springer, vol. 59(1), pages 1-33, February.

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