Trend watch: Climate risk & financial regulation in 2026 — signals, winners, and red flags

Central banks in 47 jurisdictions now mandate some form of climate risk disclosure or stress testing for supervised financial institutions, up from just 12 in 2021, according to the Network for Greening the Financial System (NGFS). This acceleration represents the most sweeping transformation in prudential regulation since the Basel III reforms following the 2008 financial crisis, and it is reshaping capital allocation, lending practices, and investment strategies across global markets.

Why It Matters

The convergence of climate science, financial stability concerns, and political momentum has pushed climate risk from a voluntary corporate social responsibility exercise into the core of financial regulation. The Bank of England's 2025 Climate Biennial Exploratory Scenario (CBES 2.0) found that UK banks and insurers face cumulative climate-related losses of GBP 225-340 billion under a late-action transition scenario, with the sharpest impacts concentrated in real estate lending, fossil fuel exposures, and supply chain-dependent manufacturing. These are not abstract projections. They translate directly into capital adequacy requirements, provisioning decisions, and strategic portfolio rebalancing already underway.

In the UK specifically, the Financial Conduct Authority (FCA) and the Prudential Regulation Authority (PRA) have moved beyond disclosure-only frameworks. The PRA's Supervisory Statement SS3/19, updated in late 2025, now requires firms to embed climate risk into their Internal Capital Adequacy Assessment Processes (ICAAPs) and to demonstrate board-level competence in climate scenario analysis. Firms that fail to meet these expectations face enhanced supervisory scrutiny, potential capital add-ons, and reputational consequences that affect market confidence.

Globally, the International Sustainability Standards Board (ISSB) IFRS S1 and S2 standards became effective for annual reporting periods beginning on or after 1 January 2024, with the first full-year reports now being filed across 23 adopting jurisdictions. The EU Corporate Sustainability Reporting Directive (CSRD) is generating mandatory double-materiality assessments for approximately 50,000 companies, while the US SEC's climate disclosure rules, though subject to legal challenges, are driving compliance preparation among large accelerated filers. This regulatory convergence is creating a global baseline for climate-related financial information that did not exist two years ago.

Key Concepts

Transition Risk Modelling quantifies the financial impact of policy changes, technology shifts, and market dynamics associated with decarbonization pathways. Leading institutions now run multi-scenario analyses spanning orderly transition (1.5C aligned), disorderly transition (delayed then rapid action), and hot house world (business as usual) scenarios. The NGFS Phase IV scenarios, released in November 2025, incorporate updated carbon price pathways ranging from $85-250 per tonne CO2e by 2035, alongside granular sector-level transition cost curves for 72 industries. Firms using these scenarios must translate macro-level pathways into portfolio-specific profit-and-loss impacts across lending, trading, and investment books.

Physical Risk Assessment evaluates the financial consequences of acute climate events (floods, wildfires, storms) and chronic shifts (sea level rise, temperature increases, precipitation changes) on asset values, creditworthiness, and insurance availability. The sophistication of physical risk tools has advanced considerably. Jupiter Intelligence, Moody's RMS, and S&P Climate Credit Analytics now offer asset-level risk scoring at resolutions of 100 metres or finer, enabling loan-level and property-level risk assessment. The UK Climate Change Committee's 2025 Risk Assessment identified coastal flooding, heat stress in urban areas, and water scarcity in southeastern England as the highest-priority physical risks for the UK financial sector.

Prudential Capital Treatment refers to how regulators incorporate climate risk into capital requirements for banks and insurers. The European Banking Authority's 2025 consultation paper proposed differential risk weights for high-carbon exposures, a mechanism that would increase the capital cost of lending to fossil fuel-intensive sectors by 15-25 basis points. The PRA has signalled similar intent, though implementation timelines remain uncertain. This represents a fundamental shift from disclosure-based to capital-based climate regulation.

Greenwashing Enforcement has escalated from reputational risk to material legal and financial risk. The FCA issued 18 formal warnings and 4 enforcement actions against asset managers for misleading sustainability claims in 2025, while the EU's Sustainable Finance Disclosure Regulation (SFDR) reclassification exercise resulted in approximately EUR 175 billion of assets being downgraded from Article 9 to Article 8 classifications. Regulators are now scrutinizing not just marketing materials but the underlying methodologies, data sources, and assumptions behind sustainability claims.

Climate Risk Financial Regulation KPIs: Benchmark Ranges

Metric	Below Average	Average	Above Average	Top Quartile
Climate Scenario Coverage (number of scenarios)	<2	2-3	3-5	>5
Portfolio Physical Risk Assessment Coverage	<30%	30-60%	60-85%	>85%
Transition Risk Data Granularity (sector level)	<10 sectors	10-30 sectors	30-60 sectors	>60 sectors
Climate Stress Test Frequency	Ad hoc	Annual	Semi-annual	Quarterly
Board Climate Competency Score (PRA criteria)	Basic awareness	Trained	Experienced	Expert oversight
TCFD/ISSB Alignment Score	<40%	40-65%	65-85%	>85%
Time to Regulatory Data Submission	>90 days	60-90 days	30-60 days	<30 days

What's Working

UK Prudential Climate Integration

The Bank of England's approach of embedding climate risk within existing prudential frameworks, rather than creating standalone climate regulations, is producing tangible outcomes. The 2025 CBES results showed that the eight largest UK banks reduced their estimated transition risk losses by 18-22% compared to the 2021 baseline, primarily through portfolio rebalancing and enhanced client engagement. Barclays, for example, set sector-specific financed emissions intensity targets across its energy, power, cement, and steel portfolios, with 2025 data showing a 15% reduction in Scope 1 and 2 financed emissions per unit of revenue lent. HSBC's climate risk function now employs over 200 specialists and integrates climate scenario outputs directly into credit approval processes for exposures exceeding GBP 10 million.

ISSB Adoption and Data Infrastructure

The rapid adoption of ISSB standards is creating comparable, decision-useful climate data at scale for the first time. The IFRS Foundation reports that as of January 2026, regulators in 23 jurisdictions (including the UK, Canada, Australia, Japan, Nigeria, and Singapore) have adopted or are formally incorporating IFRS S1 and S2 into domestic requirements. This is generating a global dataset that enables cross-border risk comparison. Data providers including Bloomberg, MSCI, and Refinitiv have integrated ISSB-aligned data fields into their platforms, reducing the manual data collection burden that previously consumed 40-60% of climate risk team capacity at major financial institutions.

Insurance Sector Physical Risk Pricing

Lloyd's of London and the London Market have led in translating physical climate risk models into pricing and underwriting decisions. Lloyd's Realistic Disaster Scenarios now include compound climate events (simultaneous drought, wildfire, and grid failure) that were not modelled five years ago. Swiss Re estimates that global insured losses from weather-related catastrophes reached $145 billion in 2025, up from $117 billion in 2024, reinforcing the financial materiality of physical risk. Munich Re's NatCatSERVICE data shows that properly risk-priced insurance portfolios outperformed those using historical loss models by 8-12% on a risk-adjusted basis over the 2022-2025 period.

What's Not Working

Data Gaps in Scope 3 and Private Markets

Despite regulatory progress, Scope 3 emissions data remains unreliable for the majority of lending and investment portfolios. A 2025 audit by the Carbon Disclosure Project found that only 38% of FTSE 350 companies reported Scope 3 emissions with sufficient granularity for financial risk assessment. Private markets, which represent approximately 45% of UK institutional investor allocations, have even poorer data coverage, with less than 20% of private equity and private credit portfolio companies providing climate disclosures that meet ISSB standards. This data deficit undermines the accuracy of portfolio-level climate risk assessments and creates blind spots in stress testing exercises.

Regulatory Fragmentation Across Jurisdictions

While the ISSB provides a global baseline, significant divergences in implementation create compliance complexity for multinational financial institutions. The EU's CSRD requires double materiality assessment (considering both financial and environmental impacts), while the ISSB focuses primarily on investor-relevant financial materiality. The SEC's rules differ from both. UK firms operating across these jurisdictions face overlapping, sometimes contradictory, requirements that increase compliance costs by an estimated 25-40% compared to single-jurisdiction firms, according to a 2025 UK Finance survey.

Greenwashing Whiplash and Capital Withdrawal

Aggressive greenwashing enforcement, while necessary, has created unintended consequences. The SFDR reclassification wave prompted some asset managers to strip sustainability labels from products entirely rather than face enforcement risk, a phenomenon termed "green-hushing." A Morningstar analysis found that European sustainable fund assets declined by EUR 48 billion in the second half of 2025, not because investor demand decreased but because managers reduced sustainability claims to avoid regulatory scrutiny. This chilling effect risks undermining the flow of capital toward genuinely sustainable investments.

Key Players

Regulators and Standard-Setters

Bank of England (PRA/FCA) remains among the most advanced central banks on climate risk integration, with its CBES stress tests setting global benchmarks for scenario analysis methodology.

ISSB/IFRS Foundation is consolidating the global sustainability disclosure landscape, with IFRS S1 and S2 now the de facto international standards for climate-related financial information.

European Banking Authority is pushing the frontier on prudential capital treatment, with its proposed risk weight adjustments representing the most direct link between climate risk and bank capital requirements.

Financial Institutions

Barclays has invested significantly in climate risk infrastructure, with sector-specific transition plans and a dedicated Climate Risk Analytics team that integrates scenario outputs into lending decisions.

Aviva Investors has emerged as a leader in climate-integrated investment management, publishing detailed transition alignment assessments for portfolio holdings and actively engaging on physical risk adaptation.

Lloyds Banking Group has deployed granular physical risk mapping across its GBP 310 billion UK mortgage portfolio, identifying approximately GBP 12 billion in exposures with elevated flood or subsidence risk requiring enhanced monitoring.

Technology and Data Providers

Jupiter Intelligence provides asset-level physical risk analytics used by 6 of the 10 largest global banks for climate stress testing.

MSCI Climate Solutions offers transition pathway alignment tools covering over 10,000 public companies and expanding into private markets.

Moody's Analytics integrates climate scenarios into credit risk models, enabling automated climate-adjusted probability-of-default calculations for commercial lending portfolios.

Action Checklist

• Map current regulatory obligations across all operating jurisdictions and identify gaps between existing capabilities and 2026-2027 requirements
• Ensure board-level climate competence meets PRA expectations, including scenario literacy and strategic oversight capability
• Implement ISSB-aligned data collection processes, prioritizing Scope 3 emissions estimation for material lending and investment exposures
• Integrate physical risk scoring at the asset or loan level, using resolution of 250 metres or finer for UK property exposures
• Embed climate scenario analysis into ICAAP processes with documented methodology, assumptions, and limitations
• Establish a greenwashing compliance framework covering product labelling, marketing materials, and client communications
• Develop transition plans for high-carbon sector exposures with measurable interim milestones
• Build internal capability for climate data validation and quality assurance rather than relying solely on vendor-provided scores

FAQ

Q: How will climate risk capital requirements affect UK bank lending in practice? A: If the EBA's proposed differential risk weights are adopted (and the PRA follows suit), banks will face higher capital costs for fossil fuel-intensive exposures. For a typical UK bank with GBP 50 billion in corporate lending, this could increase required capital by GBP 200-500 million, depending on portfolio composition. In practice, this translates to higher borrowing costs for high-carbon sectors (estimated 15-25 basis points) and improved pricing for low-carbon borrowers, creating a regulatory incentive for decarbonization.

Q: What is the realistic timeline for reliable Scope 3 data across financial portfolios? A: Full portfolio-level Scope 3 coverage with audit-quality data is unlikely before 2028-2030. In the interim, regulators accept estimation approaches using sector-average emissions factors, spend-based calculations, and supplier-specific data where available. Institutions should focus on material exposures (typically the top 50-100 counterparties by emissions intensity) rather than attempting comprehensive coverage that current data infrastructure cannot support.

Q: How should firms balance greenwashing enforcement risk with genuine sustainability commitments? A: The key is substantiation. Firms should ensure every sustainability claim is backed by documented methodology, verifiable data, and clearly stated limitations. The FCA's Anti-Greenwashing Rule, effective from May 2024, requires that sustainability references be "fair, clear, and not misleading." Practical compliance involves: maintaining evidence files for all sustainability claims, conducting regular reviews of marketing materials against underlying data, and establishing clear escalation procedures for new product labelling decisions.

Q: Are climate stress tests producing actionable results, or are they primarily compliance exercises? A: The answer depends on institutional maturity. For the top quartile of firms, climate stress tests are genuinely informing strategic decisions including portfolio rebalancing, client engagement priorities, and geographic risk appetite adjustments. The Bank of England's feedback on CBES 2.0 noted that leading firms used stress test results to identify GBP 5-15 billion in portfolio exposures requiring enhanced monitoring or active management. For many smaller firms, however, the exercise remains primarily compliance-driven, with limited integration into day-to-day risk management.

Q: What are the most important red flags for climate risk practitioners to monitor in 2026? A: Watch for: (1) acceleration of prudential capital treatment proposals, particularly the EBA's risk weight consultation outcome expected Q3 2026; (2) the SEC's climate disclosure rule litigation trajectory, which could either validate or fragment the global disclosure baseline; (3) physical risk insurance retreat, where insurers withdraw coverage from high-risk areas, creating stranded asset risks for lenders; (4) transition plan credibility challenges, as regulators shift from requiring plans to assessing whether plans are being implemented; and (5) sovereign climate risk, as rating agencies increasingly incorporate climate vulnerability into sovereign credit assessments.

Sources

• Network for Greening the Financial System. (2025). NGFS Scenarios for Central Banks and Supervisors: Phase IV Technical Documentation. Paris: NGFS Secretariat.
• Bank of England. (2025). Climate Biennial Exploratory Scenario 2.0: Results and Supervisory Findings. London: Bank of England.
• IFRS Foundation. (2026). ISSB Standards Adoption Tracker: January 2026 Update. London: IFRS Foundation.
• European Banking Authority. (2025). Consultation Paper on Prudential Treatment of Environmental Risks. Paris: EBA.
• Swiss Re Institute. (2025). Natural Catastrophes in 2025: Record Insured Losses and the Climate Risk Gap. Zurich: Swiss Re.
• Financial Conduct Authority. (2025). Sustainability Disclosure Requirements and Investment Labels: Supervisory Report. London: FCA.
• UK Climate Change Committee. (2025). Independent Assessment of UK Climate Risk: Financial Sector Implications. London: CCC.
• Carbon Disclosure Project. (2025). Corporate Climate Disclosure Quality Assessment: FTSE 350 Analysis. London: CDP.