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Long-term correlation between the green and conventional bond markets: The roles of categorical EPU indices and structural changes

Author

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  • Zhang, Hongwei
  • Wei, Shiyao
  • Guo, Yaoqi

Abstract

This study investigates the dynamic correlation between the green and conventional bond markets affected by different categories of economic policy uncertainty (EPU) using the DCC-MIDAS-X model. The results show that EPU has a significant negative impact on the long-term green-conventional bond correlation and most of the categorical EPU indices exhibit a negative impact on the long-term correlation. Furthermore, the study reveals structural changes during the COVID-19 pandemic and incorporates them into the DCC-MIDAS-X model, uncovering additional negative effect on the impact of some categories of EPU. Finally, the study examines the risk management performance using green and conventional assets. The results demonstrate that the green bond can be regarded as an efficient diversification tool for conventional bond assets and incorporating different categorical indices causes different effects on the efficiency. These findings offer valuable insights for investors and policymakers in mitigating risk across green and conventional bond markets under the period of rising EPU and frequent structural changes.

Suggested Citation

  • Zhang, Hongwei & Wei, Shiyao & Guo, Yaoqi, 2025. "Long-term correlation between the green and conventional bond markets: The roles of categorical EPU indices and structural changes," Research in International Business and Finance, Elsevier, vol. 77(PA).
    • Handle: RePEc:eee:riibaf:v:77:y:2025:i:pa:s0275531925001382
    DOI: 10.1016/j.ribaf.2025.102882
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