CAN GREEN BONDS DIVERSIFY ECONOMIC AND CLIMATE POLICY UNCERTAINTY?

The severe challenges posed by the environmental crisis and climate change have stimulated the development of the green bonds (GB) market aimed at providing bridging financing for carbon reduction. This investigation employs the wavelet-based quantile-on-quantile method to probe the asymmetric impacts among economic policy uncertainty (EPU), climate policy uncertainty (CPU) and GB. The empirical findings demonstrate that EPU and CPU have time-varying impacts on GB across different time scales. In the short term, the negative effects of EPU and CPU predominantly influence the GB market. In the long term, EPU and CPU have positive effects on the GB market during bullish market conditions but negative effects during bearish market conditions. These outcomes indicate that GB cannot always be deemed a diversifier for EPU and CPU shocks. These outcomes deviate from the Intertemporal Capital Asset Pricing Model (ICAPM) model's conclusions, which emphasize uncertainties' positive influence on the GB market. Policymakers can incorporate these findings into policy design to mitigate risks stemming from uncertainty and promote the GB market growth. Furthermore, investors should consider the effects of uncertainty to optimize their investment strategy and obtain higher returns.