Introduction

The report outlines the evolution of sustainable finance, defining ESG concepts and the ecosystem of regulators, data providers and frameworks. It highlights expanding ESG investing markets alongside regulatory developments such as EU taxonomy and disclosure rules, while noting inconsistencies in ESG data and reporting methodologies affecting comparability and asset measurement.

ESG risk

ESG risk integrates environmental, social and governance factors into financial risk assessment. It extends traditional risk frameworks by incorporating extra-financial data to evaluate long-term sustainability risks and opportunities for companies and sovereigns, influencing investment decisions and capital allocation.

ESG ccoring

ESG scoring systems use heterogeneous data to rank entities based on sustainability risks. These models are often based on unsupervised statistical methods, limiting consistency and validation. Significant divergence exists across providers, largely due to differences in measurement, scope and weighting, complicating comparability and investment use.

Impact of ESG investing on asset prices and portfolio returns

The report highlights that ESG integration influences asset prices and portfolio construction. Variations in ESG ratings and investor preferences can affect valuation and performance outcomes, though inconsistent data and methodologies make it difficult to isolate the direct impact on returns.

Sustainable financial products

Sustainable finance includes a range of products such as ESG funds, green investments and climate-aligned instruments. These products aim to integrate sustainability considerations into capital allocation, though their effectiveness depends on data quality, regulatory alignment and investor demand.

Impact investing

Impact investing targets measurable environmental and social outcomes alongside financial returns. The report links this to the Sustainable Development Goals and notes market expansion, product diversification and the emergence of biodiversity finance instruments such as blue bonds and debt-for-nature swaps, reflecting increased private sector participation.

Engagement & voting policy

Investor engagement and voting are key tools for influencing corporate behaviour. ESG considerations are increasingly integrated into stewardship practices, with investors using voting rights and engagement strategies to address sustainability risks and improve corporate disclosures and performance.

Extra-financial accounting

Extra-financial accounting involves the collection and reporting of ESG data from companies, regulators and institutions. This data underpins ESG analysis and scoring but is often inconsistent, incomplete and noisy, requiring robust statistical and modelling approaches for effective use.

Climate risk

The physics and economics of climate change

Climate change introduces both physical and transition risks, requiring a reassessment of economic models and financial theory. Traditional frameworks often fail to capture climate externalities, necessitating new approaches to modelling economic growth, risk and long-term sustainability.

Climate risk measures

Climate risk metrics include carbon intensity and green intensity, which may not align. Evidence shows high-carbon sectors can also exhibit high green investment, complicating portfolio decarbonisation and highlighting challenges in aligning investments with net zero objectives.

Transition risk modeling

Transition risks arise from regulatory, technological and market changes linked to decarbonisation. These risks affect asset values across sectors, creating stranded assets and financial losses. Measurement approaches include bottom-up asset analysis and top-down stress testing for financial systems.

Climate portfolio construction

Portfolio construction incorporates climate metrics and optimisation techniques to reduce carbon exposure while managing risk. The report highlights the growth of net zero strategies and the trade-offs between tracking error and decarbonisation, with different approaches required for equities and fixed income.

Physical risk modeling

Physical risks include acute events and chronic climate changes. The report outlines frameworks based on hazard, exposure and vulnerability, emphasising the need for quantitative modelling to link climate impacts with financial outcomes despite data and methodological limitations.

Climate stress testing and risk management

Climate stress testing evaluates financial system resilience through transmission channels such as credit, market and systemic risks. Tools include climate value-at-risk and scenario analysis, with increasing regulatory focus on integrating these methods into risk management frameworks.

Conclusion

The report concludes that sustainable finance requires integrating ESG and climate risks into financial decision-making. While tools and frameworks are advancing, challenges remain in data quality, measurement consistency and aligning financial systems with long-term sustainability objectives.