Climate Risk Pricing: When Physical Meets Financial

The $320 Billion Signal

Global natural catastrophe losses reached $320 billion in 2024, according to Munich Re, with $140 billion insured — making it the third most expensive year since 1980. Swiss Re's parallel estimate put insured losses at $137 billion. The full-year 2025 figures showed $224 billion in total damages with $108 billion insured, representing the sixth consecutive year that insured losses exceeded $100 billion. Munich Re's first-half 2025 data was particularly striking: $131 billion in overall losses with $80 billion insured, 95% above the ten-year average for the same period.

The Los Angeles wildfires of early 2025 represented a step-change in wildfire loss severity, generating $53 billion in overall losses ($40 billion insured) — nearly doubling the previous worst wildfire year (2018, at $28 billion). US thunderstorms in 2024 produced $57 billion in losses ($41 billion insured), while Hurricanes Helene and Milton together generated $56 billion in overall losses. These figures are not statistical outliers; they are the new baseline. The compounding effects of urbanisation in risk-prone areas, rising property values, and increasing weather severity mean that the loss trend is structurally upward.

The US property insurance market is in structural distress. State Farm ceased writing new homeowners policies in California in 2023. After the Palisades and Eaton fires, State Farm received a 17% emergency rate increase effective June 2025 and was barred from new non-renewals through 2025. In Florida, more than a dozen insurers have pulled out, reduced capacity, or gone out of business. The withdrawal pattern follows a clear logic: when the frequency and severity of losses exceed the pricing assumptions embedded in premium models, insurers face a choice between repricing (creating affordability crises) and withdrawal (creating availability crises). Both outcomes represent a transfer of climate risk from the insurance sector to property owners, municipalities, and ultimately taxpayers.

Convergence and Conflict

Climate disclosure regulation has entered a phase of simultaneous global convergence and jurisdictional divergence. The ISSB's IFRS S1 and S2 standards, effective January 2024, established a global baseline for sustainability and climate disclosures. Over 20 jurisdictions representing more than half of global GDP have adopted or are in the process of adopting ISSB standards. However, the substance of implementation varies dramatically across jurisdictions, creating a compliance landscape that is unified in principle but fragmented in practice.

Hong Kong: Early Alignment

The HKEX climate disclosure rules, effective January 1, 2025, require all issuers to report Scope 1 and Scope 2 emissions on a mandatory basis, with other requirements on a comply-or-explain basis for Main Board issuers. Large-cap issuers — Hang Seng Composite Index constituents — face mandatory reporting effective January 1, 2026. The framework aligns with ISSB standards, positioning Hong Kong as the first major Asian financial centre with mandatory ISSB-aligned climate disclosure. For Chinese companies listed in Hong Kong, this creates an immediate compliance obligation that exceeds domestic mainland requirements.

The 7:1 Divergence

The global carbon pricing landscape is defined by a structural divergence between the EU's mature, high-price emissions trading system and China's nascent, low-price system. The EU ETS traded at approximately $80 per tonne CO2e in 2025, reaching EUR 83.79 per tonne in December 2025 — a 30% year-over-year increase. December 2026 futures traded at EUR 87 per tonne, with an 8% reduction in allowance supply expected to create further upward price pressure. The EU ETS has reduced covered emissions from 4.6 billion tonnes in 2005 to 3.2 billion tonnes in 2024, demonstrating that carbon pricing, at sufficient levels, drives real emissions reductions.

China's ETS, the world's largest by coverage (approximately 8 billion tonnes CO2e, representing roughly 20% of global emissions), traded at $11 per tonne in 2025. In a significant expansion, China extended coverage in 2025 to include steel, cement, and electrolytic aluminium sectors, bringing total coverage to approximately 60% of national emissions. However, the 7:1 price differential with the EU creates competitive distortion that is already being addressed through the EU's Carbon Border Adjustment Mechanism (CBAM), which imposes carbon costs on imports from jurisdictions with lower carbon prices.

The global carbon market was valued at $948.75 billion in 2023 (90% from the EU ETS), with projections suggesting growth to $2.68 trillion by 2028. The voluntary carbon market (VCM) continues to face integrity challenges: fragmented standards, greenwashing concerns, and the fact that two-thirds of transactions remain private make quality verification difficult. The Integrity Council for the Voluntary Carbon Market's Core Carbon Principles are driving standardisation, with 90% of VCM transactions expected to require remote sensing verification by 2027. Article 6 of the Paris Agreement, with its rulebook finalised at COP29, has generated 97 bilateral agreements between 59 countries and 155 pilot projects as of March 2025 — creating the architecture for a connected global carbon market, though operational and governance challenges remain substantial.

The Net-Zero Reality Gap

The gap between climate commitments and production reality has never been wider. The 2025 Production Gap Report, produced by the Stockholm Environment Institute and UNEP, found that governments plan 120% more fossil fuel production in 2030 than is consistent with limiting warming to 1.5°C, and 77% more than is consistent with 2°C. Government production plans exceed their own climate pledges by 35% in 2030 and 141% in 2050. Only 6 of 20 featured countries have developed net-zero-aligned domestic fossil fuel production scenarios — up from 4 in 2023, but still a small minority.

The financial consequences of this gap are crystallising. Bloomberg estimated in March 2025 that $2.3 trillion in fossil fuel assets face stranding risk by the end of the next decade, while broader estimates suggest 37-50% devaluation of fossil fuel reserves ($13-17 trillion) under climate stabilisation scenarios. The IEA's net-zero 2050 scenario implies $90 billion in stranded coal and gas power plants by 2030 and $400 billion by 2050. The Glasgow Financial Alliance for Net Zero (GFANZ), which once represented over $100 trillion in assets with 500+ member institutions, experienced a major credibility crisis when JPMorgan Chase, Goldman Sachs, Morgan Stanley, Wells Fargo, Citigroup, and Bank of America exited in late 2024 and early 2025. GFANZ has since shifted focus from Paris-alignment requirements to mobilising capital for energy transition, targeting the $5+ trillion annual investment gap.

Growth Despite Backlash

The green bond market exceeded $3 trillion in outstanding issuance in the third quarter of 2025, with approximately $1 trillion in labelled sustainable bonds (green, social, sustainability, sustainability-linked, and transition) issued during the year. Europe dominated with $256 billion in issuance (55% of global volumes), while Asia-Pacific markets continued to grow. The broader sustainable finance market reached $13.4 trillion in 2025, projected to approach $27 trillion by 2031 at a 12.34% compound annual growth rate.

The "anti-ESG" movement in the United States, while generating significant media attention, has had less impact on actual corporate behaviour than the rhetoric suggests. Eleven US states passed anti-ESG legislation in 2025, with 106 bills introduced across the country. However, an EcoVadis study found that 87% of US companies quietly increased sustainability spending in 2025, even as only 25% of S&P 500 companies used "ESG" in report titles — down from 40% in 2024. A BNP Paribas survey of firms managing $30-35 trillion found that 87% said their ESG objectives remained unchanged and 84% expected the pace to continue or accelerate to 2030. Seventeen Democratic-leaning states issued joint communications urging asset managers to continue considering climate and ESG factors, creating a counter-movement to Republican-led anti-ESG initiatives. The pattern is clear: the substance of climate risk integration is accelerating even as the branding retreats.

Stress Testing and Adaptation

Central banks and financial supervisors are progressively integrating climate risk into prudential frameworks. The ECB's 2025 EU-wide stress test incorporated extreme flood events, finding that such scenarios could increase credit risk losses by 77 basis points in the CET1 ratio over a 2025-2027 horizon. The Bank of England's 2025 capital stress test assessed UK banking resilience to simultaneous economic and climate-related shocks. The HKMA conducted its second round of climate risk stress tests, introducing five-year scenarios for authorised institutions that assess the interaction between economic downturns and climate events.

The insurance sector faces particularly acute pressure. Munich Re projects that insurance premiums for physical climate risks could increase 50% by 2030, reaching $200-250 billion globally. Parametric insurance — which pays out based on predefined triggers rather than assessed losses — is growing rapidly, from $16.2 billion in 2024 with projections to $51 billion by 2034. Parametric products are expanding beyond earthquakes and hurricanes to cover wildfire, hail, tornado, freeze, and drought risks, driven by satellite, radar, and AI/ML-based underwriting capabilities. For international businesses, particularly those with operations in climate-vulnerable regions, the shift from indemnity to parametric coverage represents both a risk management opportunity and a signal that traditional insurance models are reaching their limits.

Strategic Implications for International Businesses

Climate risk pricing presents four strategic imperatives for international businesses. First, physical risk is being repriced through insurance withdrawal, premium escalation, and property value adjustment. Companies with assets in climate-vulnerable regions — coastal zones, wildfire-prone areas, flood plains — face not only direct physical risk but also declining insurability and asset value erosion. The six consecutive years of $100 billion insured losses are not a cycle; they are a structural shift.

Second, the disclosure landscape requires a multi-jurisdictional compliance architecture. Companies listed in Hong Kong face mandatory ISSB-aligned reporting from 2025-2026; companies with EU operations face CSRD obligations (with evolving scope); companies listed in the US face regulatory uncertainty but growing investor expectations. Scope 3 emissions reporting — which captures 65-95% of most companies' total carbon impact — remains the most challenging disclosure requirement and the area where regulatory expectations are tightening most rapidly.

Third, the carbon pricing divergence creates both competitive risk and opportunity. Chinese companies exporting to the EU face CBAM-driven carbon costs that will erode price competitiveness unless matched by domestic carbon pricing or emissions reductions. Conversely, companies that achieve genuine emissions reductions gain a competitive advantage as carbon border adjustments expand across jurisdictions.

Fourth, the net-zero reality gap creates stranded asset risk for any company with significant fossil fuel exposure. The $2.3 trillion stranding estimate is conservative; under aggressive climate policy scenarios, the figure is an order of magnitude larger. Companies must stress-test their portfolios against transition scenarios not because regulators require it, but because the financial exposure is real and growing.