More than half of global financial assets are now held outside the traditional banking system. The entities holding them — private equity funds, hedge funds, money market vehicles, and offshore special purpose vehicles — perform the same core functions as banks but operate under materially different regulatory frameworks. Here is a rigorous mapping of how that system works, where it is fragile, and what the evidence says about its trajectory.
Analysis drawing on the Financial Stability Board’s Global Monitoring Report on Non-Bank Financial Intermediation, IMF Global Financial Stability Reports, BIS Quarterly Reviews, and OECD Business and Finance Outlook data · Updated March 2026
The Financial Stability Board — the international body that monitors the global financial system on behalf of G20 member states — publishes an annual Global Monitoring Report on Non-Bank Financial Intermediation. Its most recent edition documents that entities outside the traditional banking sector now hold approximately $218 trillion in financial assets globally, representing just over 50% of total global financial assets. This is not a projection or an estimate of potential growth. It is a documented present-day reality.
The term “shadow banking” has become imprecise through overuse — it encompasses everything from money market funds to private equity buyout vehicles to hedge fund repo strategies — and the FSB itself has largely moved to the term “non-bank financial intermediation” (NBFI) to capture the breadth of what is actually being described. What these entities share is not opacity or illegality but a specific structural characteristic: they perform the core economic functions of banking — credit creation, maturity transformation, and liquidity provision — without being subject to the regulatory architecture that was built around deposit-taking institutions following the banking crises of the 20th century.
Understanding why this matters requires understanding what that regulatory architecture was designed to do, why capital has moved outside it, and where the systemic vulnerabilities in the resulting structure actually lie.
Why Capital Left the Regulated System: The Post-2008 Mechanics
The Basel III framework, developed by the Basel Committee on Banking Supervision following the 2008 Global Financial Crisis and progressively implemented through the 2010s and into the current decade under Basel IV, substantially increased the capital that banks are required to hold against their loan books. The logic was straightforward: the 2008 crisis demonstrated that banks had been operating with insufficient capital buffers to absorb losses on their credit portfolios, and that when those buffers were exhausted, the public sector was left holding the tab through emergency recapitalisations and central bank liquidity support.
The consequence was equally straightforward. Higher capital requirements make lending more expensive for regulated banks, because the capital held against a loan represents a cost — it cannot be deployed in other income-generating activities. Businesses seeking credit, and investors seeking yield, therefore had a financial incentive to find intermediaries that could provide equivalent economic functions without the capital charge.
Private equity direct lending funds, private credit funds, and the broader ecosystem of non-bank lenders that expanded dramatically after 2010 are the institutional response to that incentive. They are not unregulated in the sense of being invisible to authorities — they are registered with the SEC or equivalent regulators in their home jurisdictions, file periodic disclosures, and are subject to applicable securities law. What they are not subject to is the bank capital and liquidity framework, because they do not take retail deposits and are therefore outside the scope of prudential banking regulation.
The IMF’s Global Financial Stability Report has described this dynamic as regulatory arbitrage — the migration of economically equivalent activities to less-regulated entities in response to differential regulatory cost. The term is descriptively accurate but normatively neutral: from the perspective of businesses that can now access credit from direct lending funds rather than navigating bank credit committees, the migration has been beneficial. From the perspective of systemic risk management, the question of whether the risks that regulation was designed to contain have been eliminated or merely relocated is one the FSB has been examining with increasing urgency.
The Three Technical Mechanisms: How the Shadow System Actually Works
The NBFI sector is not a monolith. It encompasses asset managers, insurance companies, pension funds, hedge funds, private equity funds, money market funds, and a range of structured vehicles. What these entities share, at the technical level, are three core mechanisms that create both their economic utility and their systemic risk profile.
The Repo Market: Secured Short-Term Funding
The repurchase agreement — repo — market is the financing infrastructure on which a large fraction of the NBFI sector depends. In a repo transaction, a financial institution sells a security (typically a high-quality asset like a US Treasury bond) to a counterparty with a simultaneous agreement to repurchase it at a specified price on a specified date, usually overnight or within a few days. The difference between the sale price and the repurchase price represents the interest on what is economically a secured short-term loan.
The BIS Quarterly Review estimates the global repo market at approximately $10 trillion in outstanding transactions at any given time. For hedge funds and other leveraged entities, repo is the mechanism through which they achieve leverage: by using owned assets as collateral to borrow cash, then deploying that cash to purchase additional assets, which can in turn be used as collateral for further borrowing. The resulting “repo chains” can amplify initial positions by factors of ten or more.
The systemic risk in this structure is well-documented from the 2008 crisis: when counterparty confidence deteriorates, repo lenders demand additional collateral or decline to roll over overnight loans, forcing borrowers to sell assets rapidly in illiquid conditions. The resulting asset price decline further deteriorates the collateral value of remaining positions, generating a feedback loop. The Federal Reserve’s emergency interventions in the repo market in September 2019 — when overnight repo rates spiked to 10% due to a coincidence of liquidity demands — provided a reminder that this vulnerability did not disappear after 2008.
Special Purpose Vehicles: Off-Balance-Sheet Structure
A special purpose vehicle (SPV) is a legally distinct entity created by a parent firm to hold a specific pool of assets, typically structured to be bankruptcy-remote from the parent — meaning that if the parent fails, the SPV’s assets are not automatically available to the parent’s creditors. SPVs are used extensively in securitisation (pooling loans into tradeable securities), in project finance, and in structured credit transactions.
The legitimate uses of SPVs are substantial: they enable risk transfer, allow pension funds and insurance companies to invest in diversified credit portfolios without direct lending operations, and provide the structural basis for the securitisation market that channels capital into mortgages, auto loans, and corporate credit at scale. They also create opacity: the assets held in an SPV do not appear on the sponsoring firm’s balance sheet, making the sponsoring firm’s true risk exposure difficult to assess from external financial statements alone.
The Financial Stability Board’s 2023 assessment of interconnectedness in the NBFI sector highlighted SPV structures as one of the primary channels through which risks can be obscured from both investors and regulators — not through fraud but through the structural complexity of multi-layer vehicle arrangements that are individually transparent but collectively opaque.
Liquidity Mismatch: The Structural Tension
The most fundamental systemic risk in the NBFI sector is the mismatch between the liquidity that funds promise investors and the liquidity of the assets those funds hold. A money market fund or open-ended bond fund that allows daily redemptions is implicitly promising investors that their capital is liquid. If that fund holds assets — private credit, real estate debt, illiquid bonds — that cannot be sold in a day at their marked value, the promise cannot be honoured under stress conditions without either suspending redemptions or selling assets at distressed prices.
This mismatch is not unique to shadow banking — it is the same structural tension that produces bank runs — but the NBFI sector lacks the equivalent of deposit insurance and central bank lender-of-last-resort facilities that were specifically designed to prevent bank run dynamics from triggering system-wide collapses.
The March 2020 stress episode, when large-scale redemptions from money market funds and bond funds forced asset sales that temporarily impaired Treasury market functioning, required emergency intervention by the Federal Reserve to stabilise. The BIS working paper analysis of that episode documented that the size and speed of the liquidity demand exceeded what the market’s normal functioning could absorb without central bank support — an outcome that the sector’s pre-crisis stress testing had not adequately anticipated.
The episode referenced in the original article as “Spring Volatility 2025” — related to US tariff announcement shocks — represents a more recent stress test of similar dynamics, in which informal coordination between major market participants and regulatory communication prevented what several participants described as a near-freezing of certain private credit secondary markets.
The Scale: A Global Map of NBFI Assets
The FSB’s monitoring report provides the most authoritative global picture of NBFI asset distribution. The $218 trillion total reflects a broad definition that includes pension funds and insurance companies — entities that are often separately regulated but that perform maturity transformation and are therefore relevant to systemic risk assessment. The narrower definition, focused on entities with the most direct bank-like risk profiles, puts the figure closer to $63 trillion.
Both figures have grown substantially since 2008, and the composition has shifted.
United States. The US remains the largest single geography for NBFI assets, accounting for approximately 30% of the global total. The most significant post-2010 growth has been in private credit — direct lending by non-bank funds to mid-market and leveraged corporates. The private credit market has grown from under $500 billion in assets under management in 2015 to approximately $2 trillion by 2025, according to Preqin data. This growth has been driven by the demand for corporate credit that traditional bank syndicated lending markets do not efficiently serve, and by the yield premium available to investors willing to accept illiquidity.
European Union. The European Securities and Markets Authority (ESMA) documents that Alternative Investment Funds — the EU regulatory classification covering hedge funds, private equity, and real estate funds — have grown at approximately twice the rate of traditional banking assets since 2015. The EU’s Alternative Investment Fund Managers Directive (AIFMD) provides a regulatory framework for fund managers but does not subject funds themselves to bank-equivalent prudential requirements.
China. China’s NBFI sector operates under distinct political economy conditions. Following the crackdown on wealth management products and trust company lending that began in earnest from 2017 onward, China’s shadow banking sector contracted significantly from its 2016–2017 peak. It nonetheless continues to account for a substantial fraction of total credit in the Chinese economy, primarily as a channel for financing local government infrastructure projects that formal banking channels are restricted from supporting directly. The People’s Bank of China monitors this sector through a dedicated shadow banking assessment framework.
Offshore centres. The Cayman Islands, Luxembourg, Ireland, and Delaware collectively host the majority of the SPV structures and fund domiciles through which the global NBFI system operates. These jurisdictions provide legal infrastructure — predictable contract law, efficient fund registration, and in some cases tax neutrality — rather than substantive regulatory oversight. The FSB’s assessment of offshore financial centres in its monitoring report documents that a significant fraction of assets nominally domiciled in these jurisdictions represent risks that are ultimately borne by investors and counterparties in major financial centres.
The Private Credit Expansion: Apollo, Blackstone, and the New Credit Intermediaries
The most structurally significant development in the NBFI sector over the past decade is the rise of private credit as a primary source of corporate financing for mid-market and leveraged companies. Firms including Apollo Global Management, Blackstone, Ares Management, and Blue Owl Capital have built direct lending platforms that originate, hold, and manage corporate loans at a scale that was previously the exclusive domain of the commercial banking sector.
The economic proposition for borrowers is speed and certainty: a direct lending fund can commit to a loan and close a transaction in days, without the syndication process that bank-led deals require. For investors — predominantly institutional: pension funds, insurance companies, sovereign wealth funds, and endowments — the proposition is yield premium in exchange for illiquidity.
The OECD’s Business and Finance Outlook has tracked the migration of corporate debt from bank balance sheets to institutional funds, documenting that private credit’s share of total corporate debt financing has risen from approximately 5% in 2015 to an estimated 12% in 2024, with projections suggesting continued growth toward 20–25% by the early 2030s as the structural drivers — bank capital constraints, institutional investor demand for yield, corporate preference for bilateral lending relationships — remain in place.
The risk concentration question this raises is not primarily about individual fund failures but about systemic correlation. If a significant fraction of mid-market corporate credit is held by a relatively small number of large private credit funds, the behaviour of those funds under stress conditions — specifically, whether they will continue to extend credit or will restrict new lending to preserve capital — has outsized macroeconomic implications that did not exist when the same credit was distributed across hundreds of bank balance sheets.
Regulatory Architecture and Its Gaps
The post-2008 regulatory response to NBFI risk has been more developed than critics sometimes acknowledge, and less comprehensive than the scale of the sector warrants.
The FSB’s 2023 policy recommendations on NBFI resilience focused on three areas: money market fund reform (reducing the liquidity mismatch risk in these vehicles), open-ended fund reform (requiring liquidity management tools including redemption gates and swing pricing), and margining practices in derivatives markets (reducing the pro-cyclicality of collateral calls).
The SEC’s 2023 money market fund reform rules implemented mandatory liquidity fees and removed the discretionary redemption gate provisions that had proved counterproductive in the March 2020 stress episode. The ESMA guidelines on liquidity stress testing for UCITS and AIFs established minimum standards for how funds should assess and manage their liquidity risk.
What the current regulatory framework does not adequately address is the interconnectedness between regulated and unregulated entities. Banks that are subject to Basel III constraints are also significant counterparties to NBFIs through repo, derivatives, and credit facilities. When an NBFI is stressed, the risk does not remain isolated within the unregulated sector — it transmits back to regulated banks through these counterparty relationships. The FSB’s 2023 work on NBFI interconnectedness documented that this transmission channel is larger and faster-moving than earlier assessments had estimated.
The Basel Committee’s consultation paper on bank exposures to NBFIs, published in 2023, proposed additional capital requirements for bank exposures to leveraged NBFI counterparties — an acknowledgment that the regulatory perimeter around banks does not fully contain the risks that originate outside it.
The Tokenisation and AI Horizon: 2028–2035
The forward trajectory of the NBFI sector is likely to be shaped by two technological developments that are at different stages of operational maturity.
Tokenisation of private assets. The use of distributed ledger technology to represent ownership of private assets — private credit loans, real estate, infrastructure debt, private equity fund interests — as digital tokens that can be transferred and settled on-chain has moved from concept to early implementation over the past three years. BlackRock’s BUIDL fund, launched in 2024 on the Ethereum blockchain as a tokenised money market fund, is the highest-profile example, but Hamilton Lane, KKR, and Apollo have also tokenised portions of their fund structures.
The potential efficiency gains are real: tokenisation could reduce settlement times for private asset transactions from weeks to minutes, lower administrative costs for fund administration, and — potentially — create secondary markets for fund interests that are currently illiquid. The BIS Innovation Hub has published research suggesting that tokenised financial markets could reduce settlement-related costs by 30–50% for cross-border transactions.
The risk introduced is what the BIS has termed hyper-procyclicality: if private assets that are currently illiquid become tradeable at near-instant speed, the stabilising friction of illiquidity — which prevents rapid correlated selling during stress episodes — is partially removed. Assets that could previously only be sold slowly, giving markets time to stabilise, could become subject to the same momentum dynamics that characterise liquid public markets.
AI in supervision and evasion. The Financial Stability Board’s 2024 report on artificial intelligence in finance documents the dual deployment of AI technology in financial markets: by regulatory bodies for surveillance and risk monitoring (what the BIS calls “SupTech”), and by financial institutions for trading, risk management, and — at the frontier — the design of transaction structures that achieve desired economic exposures while minimising regulatory capital charges.
The concern is not that AI creates new categories of risk but that it accelerates existing dynamics: faster pattern recognition by algorithmic traders in stress episodes could amplify liquidity shocks, and more sophisticated structural engineering of financial instruments could outpace the ability of human regulators to assess their risk profiles in real time. The BIS and IMF have both advocated for investment in AI-based supervisory tools as a necessary response to AI-based financial innovation — an arms race dynamic that the regulatory community has accepted as a planning assumption.
| Metric | 2024 (actual) | 2035 (projected) |
|---|---|---|
| Total NBFI assets (broad) | ~$218 trillion | ~$350 trillion |
| Private credit share of corporate debt | ~12% | ~25–28% |
| Private asset settlement speed | T+1 to T+2 | Real-time (atomic) for tokenised assets |
| AI integration in risk monitoring | Partial, tools-based | Systemic, continuous |
The Systemic Risk Question: What Would Failure Actually Look Like?
The absence of a central bank backstop for the NBFI sector is frequently cited as its primary systemic vulnerability. This is accurate but requires precision: the absence of a formal backstop does not mean that NBFI stress episodes resolve without public sector involvement.
The March 2020 episode demonstrated that when NBFI stress is large enough to impair the functioning of core markets — particularly the US Treasury market, which is the foundational collateral for the entire global financial system — the Federal Reserve will intervene regardless of the formal regulatory perimeter. The Fed’s Commercial Paper Funding Facility and Money Market Mutual Fund Liquidity Facility were established within days of the stress episode, providing backstop liquidity to non-bank entities that are formally outside the Fed’s mandate.
The policy implication is uncomfortable: the implicit public backstop for the NBFI sector exists in practice but not in structure. Entities that benefit from implicit public support — because their failure would require public intervention regardless of their formal status — arguably should be subject to the regulatory requirements that accompany explicit public support for banks. The IMF’s October 2024 Global Financial Stability Report made this argument explicitly, recommending that the regulatory perimeter be extended to cover entities that perform bank-like functions at systemic scale, regardless of their formal classification.
The political economy of implementing this recommendation — which would require international coordination to prevent regulatory arbitrage migration to less-regulated jurisdictions — is the substantive obstacle, not the technical or conceptual case for it.
Conclusion: Infrastructure, Not Alternative
The framing of non-bank financial intermediation as “shadow” banking — implicitly alternative, peripheral, or supplementary to the real financial system — is no longer analytically accurate at $218 trillion in assets and 50% of global financial intermediation. The NBFI sector is not in the shadows of the financial system. For a growing range of economic actors and functions, it is the financial system.
That does not mean it is ungovernable or that the risks it creates are unmanageable. The FSB, IMF, BIS, and OECD collectively produce more rigorous analysis of NBFI risk than existed for the traditional banking system at equivalent scale. The regulatory developments since 2008 — money market fund reform, derivatives clearing mandates, leverage reporting requirements — have meaningfully reduced some of the most acute vulnerabilities identified in the crisis.
What they have not done is resolve the fundamental tension between the NBFI sector’s economic utility — providing credit and capital allocation functions that the regulated banking system cannot or will not provide at comparable cost — and its systemic risk profile, which under stress conditions can transmit losses to the broader economy through channels that existing regulation was not designed to contain.
The question for the next decade is not whether to regulate the shadows. It is whether the international coordination required to do so effectively can be achieved before the next significant stress episode makes the case by demonstration rather than by argument.
Sources & Further Reading
- Financial Stability Board — Global Monitoring Report on Non-Bank Financial Intermediation
- IMF — Global Financial Stability Report
- BIS — Quarterly Review and working papers on repo markets and NBFI
- OECD — Business and Finance Outlook: corporate debt migration
- Preqin — Global Private Debt Report
- SEC — Money Market Fund Reform Rules 2023
- ESMA — Liquidity stress testing guidelines for UCITS and AIFs
- BIS — Basel Committee consultation on bank exposures to NBFIs
- BIS Innovation Hub — Tokenisation research
- FSB — Artificial intelligence in finance: financial stability implications
- Federal Reserve — March 2020 emergency facility documentation
- Basel III and IV framework documentation — BIS
- People’s Bank of China — Shadow banking monitoring framework
- IMF Working Paper — China’s Shadow Banking Sector
