Market-Implied Sustainability: Insights from Funds' Portfolio Holdings

2025-10-23

AI Summary

Conventional ESG metrics rely heavily on self-reported corporate disclosures or third-party ratings, raising concerns about subjectivity, inconsistency, and potential greenwashing. Method: This paper introduces a market-based measure of corporate sustainability—“SFDR Market-Implicit Sustainability” (SMIS)—derived from fund holdings under the EU’s Sustainable Finance Disclosure Regulation (SFDR). By identifying SFDR-labeled sustainable funds and systematically comparing their stock-level portfolio weights against those of conventional funds, SMIS captures market-implied sustainability preferences without relying on firm-reported ESG data or external ratings. Contribution/Results: SMIS exhibits low correlation with mainstream ESG scores and delivers statistically significant, economically meaningful predictive power. Cross-sectional regressions and long–short portfolio tests over 2010–2023 show that firms with higher SMIS scores generate persistent, risk-adjusted excess returns. To our knowledge, this is the first study to integrate regulatory sustainability classifications with actual fund allocation behavior, yielding a verifiable, exogenous, and bias-mitigated market-implicit sustainability metric for academic and practitioner use.

Technology Category

• Search and Optimization: Evaluation and Analysis
• Game Theory and Economic Paradigms: Auctions and Market-Based Systems
• Data Mining & Knowledge Management: Anomaly/Outlier Detection

Application Category

• Search and Retrieval-Augmented AI: Web evaluation methodologies and metrics
• Economics, Online Markets and Human Computation: Sustainability of Web economics
• Security and Privacy: Large-scale security measurements

Abstract

In this work, we aim to develop a market-implied sustainability score for companies, based on the extent to which a stock is over- or under-represented in sustainable funds compared to traditional ones. To identify sustainable funds, we rely on the Sustainable Finance Disclosure Regulation (SFDR), a European framework designed to clearly categorize investment funds into different classes according to their commitment to sustainability. In our analysis, we classify as sustainable those funds categorized as Article 9 - also known as "dark green" - and compare them to funds categorized as Article 8 or Article 6. We compute an SFDR Market-Implied Sustainability (SMIS) score for a large set of European companies. We then conduct an econometric analysis to identify the factors influencing SMIS and compare them with state-of-the-art ESG (Environmental, Social, and Governance) scores provided by Refinitiv. Finally, we assess the realized risk-adjusted performance of stocks using portfolio-tilting strategies. Our results show that SMIS scores deviate substantially from traditional ESG scores and that, over the period 2010-2023, companies with high SMIS have been associated with significant financial outperformance.

Problem

• Developing market-implied sustainability scores using fund holdings
• Comparing sustainability scores with traditional ESG metrics
• Assessing financial performance of high sustainability-scored companies

Innovation

• Developed market-implied sustainability scores using SFDR
• Compared sustainable funds holdings with traditional ones
• Used econometric analysis to identify influencing factors