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The Volatility of the “Green” Option-Adjusted Spread: Evidence before and during the Pandemic Period

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  • Alessandra Ortolano

    (Department of Economic Studies, “G. d’Annunzio” Chieti-Pescara (Italy), 65127 Pescara, Italy)

  • Eugenia Nissi

    (Department of Economic Studies, “G. d’Annunzio” Chieti-Pescara (Italy), 65127 Pescara, Italy)

Abstract

The paper is an investigation on the impact of financial markets on the volatility of the green bonds credit risk component, measured by the option-adjusted spread/swap curve (OAS) before and during the pandemic period. To this purpose, after observing the dynamic joint correlations between all the variables, we adopt Exponential and Generalized AutoRegressive Conditional Heteroskedasticity models, putting the OAS as dependent variable. Our main results show that the conditional variance parameters are significant and persistent in both times, testifying the overall impact of the other markets on the OAS. In more detail, we highlight that the gamma in the two Exponential models is positive: so, the “green” credit risk volatility is more sensitive to positive shocks than to negative ones. With reference to the conditional mean, we note that if during the non-pandemic period only the stock market is significant, during the pandemic also conventional bonds and gold are impacting. To the best of our knowledge this is the first study that analyzes the specific credit risk component of the green bond yields: we deem our findings useful to observe the change of green bonds creditworthiness in a complex market context and interesting in terms of policy implications.

Suggested Citation

  • Alessandra Ortolano & Eugenia Nissi, 2022. "The Volatility of the “Green” Option-Adjusted Spread: Evidence before and during the Pandemic Period," Risks, MDPI, vol. 10(3), pages 1-13, February.
    • Handle: RePEc:gam:jrisks:v:10:y:2022:i:3:p:45-:d:755427
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    References listed on IDEAS

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