Long-Term Value at Risk · Working Paper 10
Across 1,052 of the largest listed companies in 18 Asia-Pacific and Middle Eastern economies, 70 (6.7 per cent) hold transition capital ring-fenced against reallocation. Only 11 do so by deliberate board choice. Thirteen of 18 economies show little or none. On current evidence, there is little protected corporate capital for a sovereign to lean on.
Every Nationally Determined Contribution assumes that companies will deliver part of the national reduction. This paper tests whether the capital behind that assumption is protected. Across 1,052 of the largest listed companies in 18 Asia-Pacific and Middle Eastern economies, 70 (6.7 per cent) hold transition capital ring-fenced against reallocation as at September 2026. Only 11 do so by deliberate board choice; the rest are protected by structure (REITs, pure-play clean generators) or by financial institutions' lending and investment policy.
Ring-fenced capital is read as a weak signal: an early, verifiable indicator of the resilient portion of corporate delivery, not a measure of adequacy. It matters because unprotected transition capital is what gets cut first when conditions tighten, as in 2008, 2014 to 2016 and 2020. Thirteen of the 18 economies show little or none of this protection. The pattern recurs across very different markets: it is a feature of the system, not of any one jurisdiction.
Where corporate capital falls short or does not survive stress, the gap lands with the state, whose obligation to protect the climate system the International Court of Justice confirmed in 2025. The paper offers two instruments. A sovereign choice matrix separates whether an NDC is met from whether its delivery mechanism is built to survive stress. A three-column ledger sets the sovereign transition underwriting residual beside the damage already being paid and the co-benefit dividend acting releases, and shows that inaction is not the cost-free baseline it appears.
Central bank supervisors and financial-stability teams
You run NGFS scenarios that model corporate transition delivery as a modelled output. The paper supplies an observed input for the listed large-cap channel. Where evidence sits well below your assumption, as in 13 of 18 economies, your scenario is optimistic on that channel and sovereign fiscal exposure is understated. Tier 3 meets three of the FSB's five transition-plan conditions natively: transparent, credible, comparable. A screening and engagement tool, not a capital input.
Sovereign credit analysts and IMF Article IV desks
You price sovereign risk and run Article IV surveillance. The paper links the state's filed NDC to the listed sector's evidenced ring-fenced delivery, and identifies the residual treasury implicitly carries. The 73/24 pathway split separates exposure the state closes by restraint from exposure it must actively fund. Subsidy lock-in becomes a delivery-capacity concern, not only a fiscal-transparency one. The chronic-physical and transition pricing patterns in BIS research get a corporate-side counterpart.
Finance ministries and treasuries
You carry the residual. Where delivery fails and the mechanism was not built to survive stress, the shortfall lands on your account through public health, adaptation infrastructure, insurance-market intervention, and sovereign debt for state-linked entities. Read the three-column ledger in full: residual, accumulated damage (US$700 per person per year across Asia-Pacific), and the co-benefit dividend acting releases. Inaction is not the free option. It is the most expensive one.
Exchange regulators, listing authorities, and institutional allocators
You judge a market's attractiveness and set listing rules. The paper's signals bear on how that attractiveness is read: a market whose corporate transition capital is protected by structure and the book has a narrower resilient base than one where boards have chosen it. Existing financial reporting already allows protected capital to be shown through contracted commitments, restricted cash, and the notes. Supervisors and investors can ask for this evidence now.
Across 1,052 of the largest listed companies on 21 exchanges in 18 Asia-Pacific and Middle Eastern economies, 70 (6.7 per cent) hold transition capital ring-fenced against reallocation as at September 2026. Only 11 do so by deliberate board choice. The other 59 are protected by structure (26 REITs and property trusts, 7 pure-play clean generators) or by financial institutions' lending and investment policy (26 banks and insurers). The exposed positions outnumber the resilient ones by roughly 14 to 1. The remaining 982 companies hold no protected transition capital.
The sovereign transition underwriting residual is what the state is left carrying when corporate transition capital falls short or does not survive stress. Every NDC assumes companies will deliver part of the national reduction. Where that corporate capital is not protected against reallocation, it is cut first when conditions tighten. The residual lands on sovereign accounts through public health, adaptation infrastructure, insurance-market intervention, and sovereign debt for state-linked entities. The International Court of Justice confirmed in 2025 that states carry obligations of conduct to protect the climate system; the UN General Assembly operationalised that in May 2026.
Ring-fenced capital is read in the complex-adaptive-systems tradition as a weak signal of strategic foresight: an early, verifiable indicator of the resilient portion of corporate delivery, not a claim about totality or adequacy. The paper does not measure whether protected capital is sized to each company's decarbonisation task; adequacy requires a different test. The signal matters because capital legally restricted, contractually committed, or protected by board resolution survives short-term stress, while uncommitted capital, including unprotected transition capex, is reallocated to make the numbers work when conditions tighten. This is the observed pattern of 2008, 2014 to 2016 and 2020.
The sovereign choice matrix is a two-by-two framework that separates whether an NDC's outcome is met from whether the delivery mechanism is built to survive stress. The horizontal axis is mechanism resilience: resilient on the left, not built for resilience on the right. The vertical axis is outcome: NDC met at top, NDC missed at bottom. The four cells are structured delivery (top left, NDC met with resilient design), contingent delivery (top right, NDC met but on favourable conditions), adequacy shortfall (bottom left, mechanism designed to hold but scope did not cover the task), and reallocation failure (bottom right, where NDCs are missed and the three-column ledger bites hardest).
About 73 per cent of global emissions is addressable on current economics through technologies that follow Wright's Law: solar, batteries, LEDs, heat pumps whose costs fall predictably with cumulative production. About 24 per cent (mainly agriculture, land use, forestry, waste, and heavy industry on the delivery horizon) depends on governance and innovation instead. The remaining 3 per cent is aviation. On the 73 per cent, the sovereign duty is primarily one of restraint: not to approve new fossil capacity in the crossover window, not to subsidise fossil against operating economics, not to carry fossil damage implicitly. On the 24 per cent, it is a duty to act: to fund governance and innovation working together.
Yes. The capital gate is regime-independent. Every entity in scope files audited financial statements under IFRS, IFRS-converged or national standards. All already require disclosure of contractual capital commitments and restricted cash, so ring-fenced transition capital of material scale can be shown in the accounts whether or not a sustainability standard such as IFRS S2 has been adopted. The reading needs no new rule. A supervisor can ask today what is protected, where it sits, on what evidence, and why nothing is shown where nothing appears. Where identifiable ring-fenced evidence is absent at scale across a market's largest companies, that absence is itself a supervisory signal.
WP-10 is the sovereign-level synthesis of the series. It applies the entity-level architecture of WP-01 (the 1,052-entity assessment and the five-tier ladder), the physical-economic architecture of WP-03 (Wright's Law and the 73/24 pathway split), and the co-benefit dividend framework of WP-04 to the sovereign question: whose obligation does the shortfall become when the corporate portion of NDC delivery does not survive stress? For central bank supervisors whose NGFS workflows treat corporate transition as a modelled output, the Tier 3 count supplies an observed input.
Full paper on SSRN: The Sovereign Transition Underwriting Gap: What Treasury Carries When Corporate Capital Doesn't
Author page: Joanne Flinn on SSRN
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