We investigate the portfolio frontier and risk premia in equilibrium when institutional investors aim to minimize the tracking error variance and to attain a certain ESG score (ESG mandate). Provided that a negative ESG premium is priced by the market, we show that an ESG mandate can reduce the mean–variance inefficiency of the portfolio frontier when the asset manager targets a limited over-performance return with respect to the benchmark. In equilibrium, with mean–variance investors and asset managers endowed with an ESG mandate, a negative ESG premium arises if the mandate is binding for asset managers. The negative ESG premium is due to the ESG constraint (institutional investors over-invest in virtuous ESG stocks). We find empirical evidence of such a negative premium in the US market

This article studies how ESG and conventional mutual funds trade stocks during the COVID-19 crash. Both fund types trade individual stocks similarly: Net purchases of ESG stocks are less sensitive than other stocks to fund flows pre-crash, but sensitivities increase for all stocks during the crash. In contrast, ESG funds’ aggregate net purchases are less sensitive than those of conventional funds during the crash. This difference is due to ESG funds’ portfolio tilt toward the less flow-sensitive ESG stocks. There is no evidence of an ESG clientele effect in trading decisions, as both fund types trade individual stocks similarly

We examine whether and how common ownership affects Environmental, Social, and Governance (ESG) ratings—an important research question given the increasing use of these ratings in investment decisions and corporate evaluations. We find that companies with major shareholders in common with the rating agency (“sister firms”) tend to receive higher ESG ratings. When a company becomes a sister firm through a change in the rating agency's ownership structure, its rating from that agency is subsequently upgraded, whereas its ESG ratings from other agencies remain unchanged. Sister firms exhibit greater rating disagreements across agencies than other firms. The higher ESG ratings for sister firms are partly attributable to the transfer of immaterial positive ESG information through common owners. The common ownership effect is more pronounced when the owner can exert a greater influence on the rating agency. Moreover, sister firms with initially elevated ratings demonstrate poorer future ESG performance. Overall, our findings suggest that owners can affect ESG ratings of their portfolio companies in a way consistent with their influence and interest

This paper develops and tests an equilibrium model of active fund management with ESG considerations. Heterogeneous sustainability preferences lead fund managers to intensify information acquisition on assets across the ESG spectrum, broadening the scope of active management. This information channel enhances price informativeness, lowers discount rates, and increases portfolio deviation from benchmarks. The model predicts a negative and concave ESG-expected return relation, stronger for green assets and weaker for brown assets. Using data on U.S. mutual funds and stocks from 2007–2021, we find supporting evidence based on price informativeness and the implied cost of equity capital

By analyzing a sample of US and European listed banks over the years 2015–2022, we investigate the relationship between greenwashing behavior and systemic risk. We use a measure of greenwashing that considers the consistency of what banks disclose with what they actually do to address ESG-related issues. We find that engaging in greenwashing practices contributes to undermining financial stability, with a rise in systemic risk which is exacerbated for less efficient and larger banks. Market seems to acknowledge a superior informative value to banks’ actual ESG performance, giving less importance to what they disclose. Finally, a better performance in each of the environmental, social and governance dimensions reduces systemic risk, but only a bank’s commitment in addressing environment-related issues seems to moderate the contribution of greenwashing to financial system fragility

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This study analyzes the evolution of climate-risk discourse in banking using 4,887 news articles (2008–2024) collected from ProQuest. We apply Natural Language Processing and add two novel layers: (i) an event-alignment analysis that links coverage dynamics to dated policy and supervisory milestones, and (ii) a discourse-network analysis connecting banks and regulators. We document a marked post-2020 shift, with ESG emerging as the dominant framing (7,860 mentions) alongside persistent geographic asymmetries (U.S.-led coverage) and uneven sectoral engagement (Risk Management highest salience; Fintech lowest). Sentiment skews positive (≈4,000 positive vs. ≈1,500 negative), and topic modeling identifies eight stable thematic clusters spanning operations, ratings, ESG assessment, disclosures, and market instruments. Event alignment shows media attention is typically anticipatory (median peak two months before an anchor), with COP26 producing a sustained level shift (+100% within a ±6-month window) and the Bank of England’s CBES results generating the largest single spike (210 articles), whereas some 2022 rule-making announcements (e.g., SEC climate-disclosure proposal) exhibit sharper but less durable attention. The discourse network centers on two regulatory hubs (the Federal Reserve and the ECB) with key banks (e.g., Citigroup, JPMorgan, UBS) bridging into supervisory narratives. Collectively, the findings show climate risk becoming embedded in core banking practice while revealing structural, regional, and functional asymmetries that matter for policy design and implementation. • Provides the first longitudinal NLP-based analysis of climate risk discourse in the banking sector • Reveals how climate risk integration in banking has evolved across regulatory, operational, and market dimensions • Identifies distinct thematic domains shaping climate risk narratives in banking over time • Shows that climate risk discourse is predominantly anticipatory around major policy and supervisory milestones • Maps the institutional structure of climate risk governance by linking banks and regulators within a discourse network

We examine whether free-speech protections influence corporate environmental performance. Using the staggered enactment of U.S. anti-SLAPP statutes in a stacked difference-in-differences design from 1990 to 2019, we find that these laws significantly reduce firms’ toxic emissions without curbing economic activity. Anti-SLAPP enactments also promote environmental investment through green innovation, abatement spending, and waste reduction management, and strengthen governance via improved sustainability oversight, ESG-linked executive pay, employee training, and supply chain management. The effects are stronger when stakeholder monitoring is stronger and when managerial incentives embed sustainability goals. Overall, free-speech protections generate powerful environmental benefits

We document a smaller expansion of the negative CDS-bond basis and lower selling pressure during the Covid crisis for bonds issued by firms with high environmental and social (E&S) scores, relative to bonds from low E&S firms. This pattern is consistent with lower investor outflows from sustainability focused funds rather than fund managers discriminating among which bonds to sell. Our results suggest that the relative performance of high and low E&S bonds during a crisis is influenced not only by shifts in firm fundamentals, but also by non-fundamental factors such as investor preferences and trading behaviour.

We investigate whether green innovators voluntarily provide innovation disclosure to reduce processing costs for stakeholders and gain green-specific disclosure benefits. We observe that green patenting firms provide more innovation disclosure in conference calls than do other innovating peers, controlling for patent value. Using a patent-call unit of analysis, we also provide within-firm evidence that managers highlight their green inventions more on conference calls relative to their other inventions. Green innovators provide more innovation disclosure when the costs of processing patent information are higher and anticipated disclosure benefits are greater. We find some evidence that innovation disclosure is positively associated with green fund ownership and stronger market responses to conference calls as well as proxies for ESG-related reputation. Our findings highlight both capital market and social capital benefits as motivating forces for voluntary innovation disclosure and suggest the nature of a firm’s innovations can impact its information environment