The impact of climate policies on financial markets: Evidence from the EU Carbon Border Adjustment Mechanism

Mengjie Shi, Yupu Zhang and Christoph Meinerding

No 14/2025, Discussion Papers from Deutsche Bundesbank

Abstract: The introduction of the EU Carbon Border Adjustment Mechanism (CBAM) has triggered statistically significant negative stock market responses for firms within the EU. Comparing EU customers that have non-EU suppliers in CBAM-affected industries with their non- treated peers in the control group, we find an extra cumulative abnormal return of up to -1.3 percentage points over our main five-day event window around December 13, 2022. Fur- thermore, we document substantial anticipatory market responses reflecting updated beliefs about broader climate policy developments going forward. This paper is the first to provide empirical evidence of carbon border tax impacts on firm valuations through international supply chains. Our findings contribute to the understanding of climate policy transmission through international trade networks and inform the debate on stranded assets resulting from environmental regulations.

Keywords: Carbon border adjustment mechanism; carbon pricing; supply chain; event study; cumulative abnormal returns; trade (search for similar items in EconPapers)
JEL-codes: G12 G14 G15 Q58 (search for similar items in EconPapers)
Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:zbw:bubdps:319628

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