The impact of climate policy on U.S. environmentally friendly firms: A firm-level examination of stock return, volatility, volume, and connectedness
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Date
2023-03
Open Access Location
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier B V
Rights
(c) 2023 The Author/s
CC BY 4.0
CC BY 4.0
Abstract
This paper investigates the green stock market reaction to climate policy events associated with the Paris Agreement and the U.S. presidential elections. We document abnormal returns, volatility and volume reactions to climate policy events among green stocks. However, the magnitude of the reactions varies between the tightening and loosening of climate policy and across subgroups of the green stock markets. Our connectedness analysis further investigates the spillover patterns among individual green stocks and confirms their heterogeneous natures when responding to the occurrence of these climate policy events. By constructing a minimum connectedness portfolio based on the estimated connectedness among these green stocks, we find that investors can substantially reduce their risks. Our findings have strong implications for policy makers in designing policies to effectively promote green investments and mitigate climate change.
Description
Keywords
Clean energy, Climate policy, Firm-level analysis, Event study, Connectedness, Portfolio implications
Citation
Pham L, Hao W, Truong H, Trinh HH. (2023). The impact of climate policy on U.S. environmentally friendly firms: A firm-level examination of stock return, volatility, volume, and connectedness. Energy Economics. 119.