A09 · TOPIC · cross-border-supervisionGRA dossier · service level R0
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Topic dossier · Financial Regulation Nexus

Cross-border supervision

Large banks, insurers and market infrastructures operate across many jurisdictions, but supervisory and resolution powers stop at national borders. International standards, supervisory colleges, memoranda of understanding and peer review try to close that gap. This page explains how cross-border gaps and arbitrage develop, why home and host authorities can pull in different directions, which records show the state of cooperation, and who decides how far authorities defer to each other.

Systems · around this subjectDesign, not a record

Supervisory review console

Cross-border supervision · Bank supervision · Cycle 1

10 findings overdueGRA · Financial Regulation Nexus

Firms by risk rating

Bank BHigh34Enhanced
Bank DMedium23Standard
Insurer AlphaHigh33Enhanced
Fintech F1Low22Light

Findings

Open01
Model validation gapsBank B
Remediating01
Climate data qualityInsurer Alpha
Closed01
Liquidity reportingBank D

Climate expectations met

share of firms, thematic review

Governance81 pct · req 100Risk management73 pct · req 100Scenario analysis33 pct · req 100Disclosure69 pct · req 100
Supervisory review console: the screen's structure, terms and states for Cross-border supervision.Placeholder names and illustrative values; a design, not a record or a live system.

Fig.Supervisory review console. Design wireframe with placeholder names and illustrative values, not a record or a live system.

01In brief

The short answer.

Cross-border supervision is the cooperation through which authorities oversee banks, insurers and infrastructures that operate in many jurisdictions while their powers stop at national borders. International standards, supervisory colleges, memoranda of understanding and peer reviews support it; in stress, host authorities may ring-fence.

02Spatial finance

Settlement dependencies, and what fails with a node.

How a failure at one financial centre can spread through settlement links. Design links, not real dependencies.

Sixteen financial centres, and how a failure at one spreads through settlement links.Design links, not the real dependencies of any infrastructure.
03The question

Cross-border supervision: how the risk develops.

International standards and cooperation. The dossier below sets out how the risk develops, what is measured, where the data come from, how it is modelled and who decides.

Mechanism

Home and host incentives diverge

A home supervisor looks at the whole group; a host supervisor looks at the local entity and its depositors. In calm times they cooperate, in stress each may ring-fence assets and liquidity, which can deepen the group's problem.

Mechanism

Information does not travel

Confidentiality laws, differing formats and slow processes limit what one authority can share with another. Risks that span entities in several countries can go unseen by each authority alone.

Mechanism

Booking models exploit borders

Firms can book activity where rules, taxes or supervision are lightest while serving clients elsewhere. Branches, back-to-back trades and remote booking move risk away from the authority that sees the client.

Mechanism

Standards rest on national will

International standard setters have no enforcement power. Implementation depends on peer pressure, market discipline and conditionality in IMF programmes, so gaps can persist for years.

04Key terms

Terms used on this page.

Each term as this page uses it. Where a standard-setting body defines the term, the wording follows that body.

TermDefinition
Supervisory collegeA group of supervisors from different jurisdictions that share information on a cross-border group.
Ring-fencingMeasures that keep capital, liquidity or operations within a jurisdiction to protect local creditors.
EquivalenceA decision that another jurisdiction's rules achieve equivalent outcomes, allowing reliance on them.
05Indicators

What is measured, and how well.

Each indicator carries its unit, its cadence, the kind of source behind it and the evidence label a value would carry. No values are shown: a programme supplies them under its own authority.

IndicatorUnitCadenceSource typeLabel
Signatories to the IOSCO multilateral MoUcount and status of signatoriesas updatedIOSCO signatory listOFFICIAL
Crisis management groups for systemic firmspresence per global systemically important firmannualFSB resolution reportingOFFICIAL
Cross-border bank claimscurrency amount by counterparty countryquarterlyBIS locational and consolidated banking statisticsOFFICIAL
Equivalence and deference decisionscount by framework and third countryas adoptedEquivalence decision recordsOFFICIAL
FSB peer review recommendations followed upstatus per recommendationper reviewFSB peer reviewsOFFICIAL
FATF effectiveness ratings on international cooperationrating per immediate outcomeper evaluationFATF mutual evaluation reportsOFFICIAL
Supervisory colleges establishedpresence per cross-border groupannualAuthority annual reportsREPORTED
06Canvas

From sources to decisions.

The topic as a computational graph: named sources feed the methods, an evidence review gates the outputs, and the decisions stay with the authorities that hold them.

Pipeline canvas · Cross-border supervision as a run graphDesign, not a record
Cross-border supervision: bank stress testA scenario is designed and the balance sheet projected; credit losses, net interest income and market losses are estimated; capital ratios are compared with the hurdle, management actions considered and the supervisor reviews. Design of the process, not a record of a run.

Fig. 02Nodes carry their type, two metric rows and a state; connectors show what feeds what; dashed frames name the owners; the timeline is the cadence. Design of the pipeline, not a record of a run.

07Sources

Where the evidence comes from.

Named public datasets and institutional records, each with its licence class. Sources by agreement are used only under their terms and never republished.

SourceWhat it givesLicence class
BIS locational and consolidated banking statisticsCross-border claims and liabilities of internationally active banksPublic, BIS terms of use with attribution
IOSCO multilateral MoU signatory listSecurities regulators committed to enforcement cooperation and information exchangePublic, terms per IOSCO
FSB peer reviews and annual implementation reportCountry and thematic peer reviews and the status of G20 reformsPublic, terms per FSB
FATF mutual evaluation reports and consolidated ratingsTechnical compliance and effectiveness ratings, including international cooperationPublic, terms per FATF
European Commission equivalence decisionsThird-country equivalence decisions under EU financial lawPublic, EU reuse policy with attribution
IMF Financial Sector Assessment Program reportsAssessments of cross-border cooperation and home-host arrangementsPublic, IMF copyright and terms
08Decisions

Who decides, and what the evidence serves.

Financial Regulation Nexus prepares evidence. The decisions below are taken by the authorities named, under their own rules, and never by the platform.

Who decidesThe questionEvidence this page serves
Financial Stability Board and international standard settersWhere cooperation arrangements need strengthening and how implementation is monitoredPeer review outcomes and documented gaps in cooperation
Home and host supervisorsWhat information to share and how to coordinate supervision and crisis actionCollege practice, MoU coverage and case histories of cooperation in stress
Legislatures and the European CommissionWhether to grant equivalence, require subsidiaries or allow branchesComparative branch and equivalence regimes and their effects
G20 leaders and finance ministersWhich reforms to mandate and reviewImplementation reports and peer reviews

Outputs this topic produces

  • Maps of cooperation agreements, colleges and crisis management groups
  • Comparative briefs on equivalence, deference and branch regimes
  • Supervisory learning material on home-host cooperation in stress
  • Guides to cross-border banking statistics and their gaps
09Core questions

What experts ask.

Cross-border supervision researchers ask how national authorities oversee international activity.

  • How are international standards developed, and how consistently are they implemented?
  • How do home and host supervisors share information and coordinate on cross-border groups?
  • What causes regulatory fragmentation, and what are its costs and benefits?
  • How are cross-border resolution and crisis management coordinated?
  • How do differences in rules create arbitrage opportunities?
10Mechanisms and drivers

Global institutions, national authority.

International standard setters develop standards through consensus among member authorities, but standards have no legal force until adopted nationally. Implementation varies in timing and detail. Cross-border groups are supervised by home authorities for the group and host authorities for local entities, coordinated through colleges and cooperation agreements.

Information sharing between authorities is a precondition for effective oversight of cross-border groups, but it is limited by confidentiality law, differing legal frameworks and trust. Memoranda of understanding and colleges help, yet authorities may still see only part of a group's risk.

In a crisis, national authorities face pressure to protect domestic depositors and taxpayers, which can lead to ring-fencing of assets and capital. Fragmentation can increase resilience locally while reducing efficiency and creating trapped liquidity. Balancing cooperation and national interest is a recurring theme.

11Methods and data

How the evidence is built, and where it stops.

  1. 01

    Implementation monitoring

    Comparing national adoption of standards using policy and institutional science. Assessments may lag.

  2. 02

    Game-theoretic analysis

    Modelling incentives for cooperation with game theory and mechanism design. Simplifies real behaviour.

  3. 03

    Case studies

    Studying cross-border failures and resolutions. Few cases exist.

  4. 04

    Legal analysis

    Comparing cooperation agreements. Many are confidential.

12Methods

How it is studied, and what the methods cannot say.

  1. Game theory and mechanism designHome-host cooperation in resolution · Regulatory competition between jurisdictionsApplied here
  2. Policy, institutional and decision scienceRegulatory impact assessment · Comparing supervisory architecturesApplied here
  3. Financial economics and macro-financeCosts and benefits of capital requirements · Tracing leakage of macroprudential measuresApplied here
  4. Data engineering, interoperability and stewardshipMapping templates to a common model · Entity resolution with identifiersApplied here
13Questions

Questions and answers.

What is a supervisory college?
A standing group of the supervisors of a cross-border firm, chaired by the home supervisor, that shares information and coordinates supervisory work. It does not transfer legal powers between members.
What does equivalence mean?
A decision that another jurisdiction's rules achieve outcomes comparable to one's own, allowing reliance on that regime. It can be granted, made conditional or withdrawn.
Why do host authorities ring-fence?
To protect local depositors and creditors if the group fails. The cost is that trapped capital and liquidity cannot support the group where it is needed.
Are international standards binding?
Not by themselves. They become binding when national authorities adopt them into their own law or rules.
Does the platform take part in standard setting?
No. It studies standards and their implementation. Standard setting belongs to the member authorities.
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