Do all financial activities, such as lending, borrowing, and investing, occur through traditional banks? In reality, the data suggest otherwise: a large portion of global financial activity now occurs outside the traditional banking sector. According to the Financial Stability Board (FSB), the global non-bank financial sector held about $256.8 trillion in assets in 2024, representing roughly 51% of global financial assets, and is expanding at nearly twice the rate of traditional banks (Reuters, 2025).

This growing sector is referred to as shadow banking. The term “shadow banking” was introduced by economist Paul McCulley in a 2007 speech at the Federal Reserve Bank of Kansas City’s economic symposium in Jackson Hole. He used the term to describe financial intermediaries that engage in credit intermediation but lack the regulatory protections that apply to commercial banks (IMF). In simpler terms, Shadow banking refers to financial institutions that conduct bank-like activities but operate outside traditional banking regulations. These institutions include money market funds, hedge funds, private credit funds, pension funds, and insurance companies. Unlike traditional banks, shadow banks do not accept government-issued deposits and cannot access emergency support from central banks. As a result, they operate with fewer safeguards, which can increase financial vulnerability.

Key Characteristics

Shadow banking institutions perform several core financial functions similar to traditional banks.

One important mechanism is maturity transformation, in which institutions borrow money short-term and lend or invest it for the long term. While this practice can increase credit availability, it can also create instability if investors suddenly withdraw funding.

Another feature is liquidity transformation, in which lesser liquid assets, such as mortgage loans, are converted into securities that can be traded more easily in financial markets.

Shadow banking also often involves high leverage, meaning institutions borrow large amounts of money to increase investment size. While leverage can increase profits, it can also amplify losses during economic downturns.

The Role of Securitization

A major tool used within shadow banking is securitization. In this process, financial institutions bundle loans, such as mortgages or auto loans, into securities that are sold to investors.

For example, mortgages may be packaged into mortgage-backed securities (MBS) or more complex products like collateralized debt obligations (CDOs). This allows banks to transfer risk to investors while freeing up capital to issue new loans.

While securitization spreads risk across the financial system, it can also make risks harder to trace, especially when financial products become highly complex.

Contribution to Financial Crises

Shadow banking played a significant role in the 2008 Global Financial Crisis. In the years leading up to the crisis, large volumes of mortgage loans were securitized and sold to investors worldwide. When housing prices fell and mortgage defaults increased, these securities rapidly lost value.

Because risks had been widely distributed across financial institutions, uncertainty spread quickly throughout global markets. Many institutions relying on short-term funding suddenly faced liquidity shortages, triggering a severe financial panic.

Why Shadow Banking Continues to Grow

Stricter regulations on traditional banks have unintentionally encouraged financial activity to move toward less-regulated sectors. As regulations tighten within banks, financial institutions often shift lending and investment activities into shadow banking structures.

This process is often described as risk migration, where financial risk moves from highly regulated institutions to areas with weaker oversight.

Shadow banking and securitization have expanded credit availability and transformed modern financial markets. However, they have also created complex financial networks where risk can move across institutions in ways that are difficult to monitor.

Because these risks often develop outside traditional regulatory systems, they can accumulate quietly until financial stress exposes them. As a result, understanding the relationship between shadow banking, securitization, and systemic risk is essential for preventing future financial crises.

Works Cited

Financial Stability Board (FSB). (2024). Global Monitoring Report on Non-Bank Financial Intermediation.
https://www.fsb.org/2024/12/global-monitoring-report-on-non-bank-financial-intermediation-2024/ 

Reuters. (2025). Shadow banking is growing at double the rate of traditional lenders, FSB says.
https://www.reuters.com/sustainability/boards-policy-regulation/shadow-banking-growing-double-rate-traditional-lenders-fsb-says-2025-12-16/

International Monetary Fund (IMF). Shadow Banks: Back to Basics.
https://www.imf.org/en/publications/fandd/issues/series/back-to-basics/shadow-banks

Investopedia. Maturity Transformation.
https://www.investopedia.com/what-is-maturity-transformation-7480836

Investopedia. Shadow Banking System.
https://www.investopedia.com/terms/s/shadow-banking-system.asp

Federal Reserve Bank of New York. The Shadow Banking System.
https://www.newyorkfed.org/medialibrary/media/research/epr/2013/0713adri.pdf