株式市場は炭素国境調整を価格に織り込むか
Do equity markets price carbon border (原題)
Noureddine Benlagha
🤖 gxceed AI 要約
日本語
EU炭素国境調整メカニズム（CBAM）に対する株式市場の反応を、非EU53カ国の対象品目生産者675社と上場企業のイベントスタディで分析。CBAM発表時にEU輸出曝露度が高い企業の異常リターンは低下せず、2025年の簡素化による救済も限定的だった。CBAMの保護対象であるEU生産者にも利益が確認されず、市場は炭素国境税のコスト移転を十分に織り込んでいない可能性を示す。
English
This study examines whether equity markets price exposure to the EU Carbon Border Adjustment Mechanism (CBAM) using an event-study model around five CBAM announcements, covering 675 producers of covered goods in 53 non-EU countries and listed firms. Abnormal returns do not fall with EU import exposure on tightening news, and the 2025 simplification brought at most modest relief to exposed producers. EU producers protected by CBAM do not gain either, suggesting markets may not fully price the cost-shifting effects of carbon border taxes.
Unofficial AI-generated summary based on the public title and abstract. Not an official translation.
📝 gxceed 編集解説 — Why this matters
日本のGX文脈において
日本企業はCBAM対象品目（鉄鋼・アルミ・セメント等）の対EU輸出曝露があり、炭素価格リスクの株式評価はSSBJ開示や投資家対応に直結する。市場がCBAMを織り込んでいないなら、日本企業の情報開示と投資家対話の重要性が増す。
In the global GX context
As CBAM moves from announcement to implementation, this paper tests whether equity markets efficiently price carbon border exposure—a key question for global disclosure scholarship on whether carbon pricing risk is reflected in valuations. The finding of muted market reaction challenges assumptions behind TCFD/ISSB climate risk disclosure and transition finance pricing.
👥 読者別の含意
🔬研究者:Provides empirical evidence on market pricing of CBAM, useful for studying carbon pricing risk transmission and event-study methodology in climate policy.
🏢実務担当者:Suggests that equity markets may not yet price CBAM exposure, implying a need for proactive investor communication and scenario disclosure on carbon border costs.
🏛政策担当者:Highlights that CBAM announcements have not strongly moved equity markets, raising questions about policy credibility and market signaling.
📄 Abstract（原文）
Carbon border taxes are expected to shift part of the cost of climate policy ontoforeign producers. This study examines whether equity markets price exposure tothe EU Carbon Border Adjustment Mechanism (CBAM). Using 675 producers ofcovered goods in 53 non-EU countries and listed firms in the same countries, weestimate an event-study model with country-by-event fixed effects around five CBAMannouncements. Our findings reveal that abnormal returns do not fall with exposureto EU imports on tightening news. Notably, the 2025 simplification brought at mosta modest relief to exposed producers. Further analysis shows that EU producers,which CBAM protects, do not gain either.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.6084/m9.figshare.34947334first seen 2026-11-10 05:05:16 · last seen 2026-11-13 05:17:11
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