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Carbon Intensity, Volatility Spillovers, and Market Connectedness in Hong Kong Stocks

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  • Eddie Y. M. Lam

    (Lee Shau Kee School of Business and Administration, Hong Kong Metropolitan University, Hong Kong, China)

  • Yiuman Tse

    (Department of Finance, Colleague of Business Administration, University of Missouri, St Louis, MO 63121-4400, USA)

  • Joseph K. W. Fung

    (Lee Shau Kee School of Business and Administration, Hong Kong Metropolitan University, Hong Kong, China)

Abstract

This paper examines the firm-level carbon intensity of 83 constituent stocks in the Hang Seng Index, constructs two distinct indexes from the 20 firms with the highest and lowest carbon intensities, and analyzes the connectedness of their annualized daily volatilities with four key external factors over the past 15 years. Our findings reveal that low-carbon stocks—often represented by high-tech and financial firms—tend to exhibit higher volatility, reflecting their more dynamic business environments and greater sensitivity to changes in revenue and profitability. In contrast, high-carbon companies, such as those in the utilities and energy sectors, display more stable demand patterns and are generally less exposed to abrupt market shocks. We also find that oil price shocks result in greater volatility spillovers for low-carbon stocks. Among external influences, the U.S. stock market and Treasury yield exert the most significant spillover effects, while crude oil prices and the U.S. dollar–Chinese yuan exchange rate act as net volatility recipients.

Suggested Citation

  • Eddie Y. M. Lam & Yiuman Tse & Joseph K. W. Fung, 2025. "Carbon Intensity, Volatility Spillovers, and Market Connectedness in Hong Kong Stocks," JRFM, MDPI, vol. 18(7), pages 1-22, June.
    • Handle: RePEc:gam:jjrfmx:v:18:y:2025:i:7:p:352-:d:1686800
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    References listed on IDEAS

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