Climate risk disclosure: the next frontier of capital market transparency

Introduction: The Economic Logic of Climate Transparency

The core idea of U.S. federal securities law is that transparency promotes efficient capital market functioning. In the context of the increasingly urgent climate crisis, this logic has even greater practical significance. The climate-related risks faced by companies include physical risks (e.g., hurricanes destroying facilities) and transition risks (e.g., policy shifts toward a low-carbon economy, technological disruption). However, the U.S. Securities and Exchange Commission (SEC) currently relies primarily on the "materiality" principle, leaving disclosure content to management's discretion, which prevents investors from comparing different companies' strategies, risks, and performance. This information asymmetry raises the cost of capital and distorts the efficiency of capital allocation.

Why Does the Voluntary Disclosure System Fail?

Currently, most companies' climate reports lack comparability and verifiability. These reports are often filled with case studies and optimistic scenarios, are not independently audited, and auditors are not even obligated to read them. More critically, there is a disconnect between climate reports and financial statements—investors cannot determine whether a company's stated emission reduction targets materially affect its asset impairments, liabilities, or future cash flows. This fragmentation prevents capital from effectively flowing to companies that are truly competitive in the low-carbon transition.

Accounting and Auditing: Key Tools for Resolving Information Asymmetry

Accounting and auditing are core mechanisms for delivering reliable climate information to the market. The SEC has full authority to take four actions within the current framework:

1. Strictly enforce existing disclosure requirements: Climate risks already involve multiple accounting areas (e.g., asset impairment, contingent liabilities), but most companies have not explicitly reflected them in their financial statements. The SEC should require companies to explain how climate risks are incorporated into accounting estimates.

2. Develop unified climate disclosure standards: Referencing mainstream global frameworks (e.g., TCFD), require companies to disclose Scope 1, 2, and 3 emissions, as well as the results of climate scenario analysis.

3. Require auditors to participate in reviews: Auditors should at least read climate reports and assess whether the financial statements are consistent with the information contained therein.

4. Strengthen accountability mechanisms: Take enforcement actions against false or misleading disclosures to increase the cost of violations.

Profound Impact on Capital Markets

High-quality climate disclosure can bring three key benefits:

• Lower cost of capital: The more transparent the information, the more accurately investors assess risks, and the lower the risk premium required.
• Optimize capital allocation: Capital will concentrate on companies that adapt to the low-carbon transition, accelerating the exit of high-carbon companies.
• Enhance investor oversight: Regular, comparable emissions data enable shareholders to effectively supervise management in fulfilling their commitments.

Lessons and Challenges from Brazil

Brazil, as a major agricultural, mining, and energy country, faces particularly prominent climate risks: deforestation in the Amazon rainforest may affect the credibility of commodity exports, extreme weather threatens crop yields, and global carbon border adjustment mechanisms (e.g., the EU's CBAM) impact industrial exports.Brazil, as a major agricultural, mining, and energy power, faces particularly prominent climate risks: deforestation in the Amazon rainforest may affect the credibility of commodity exports, extreme weather threatens crop yields, and global carbon border adjustment mechanisms (such as the EU's CBAM) impact industrial exports. Currently, Brazil's Securities and Exchange Commission (CVM) has not yet established a mandatory climate disclosure system, and most companies rely on voluntary disclosures. If Brazil can learn from the U.S. reform approach and take the lead in implementing unified climate accounting and auditing requirements for listed companies, it will help attract international green capital and solidify its position as a destination for sustainable development investments.

Conclusion: Transparency is the First Cornerstone of Climate Action

The climate crisis will not wait for capital markets to evolve slowly. The direction of the SEC's reforms—moving from voluntary to mandatory, from vague to precise—represents the future regulatory trend. Accounting and auditing are not technical details but the infrastructure that determines capital flows and risk pricing. For emerging economies like Brazil, the earlier such frameworks are established, the better positioned they will be to seize the initiative in the global low-carbon race.