Financial intermediation is the process through which institutions connect providers of finance with households, businesses, and governments seeking funding, while assessing creditworthiness, managing risks, and transforming financial claims. A bank is a central example, but investment funds, insurers, pension funds, and other nonbank institutions also perform intermediary functions. Intermediation is not merely the transfer of existing savings: commercial banks can create deposits when they lend, whereas other intermediaries generally channel funds already raised from investors or creditors. (imf.org)
Institutional forms and financing channels
In bank-based intermediation, the institution stands between its creditors and borrowers. Depositors hold claims against the bank rather than against individual borrowers, while loans appear as assets on the bank’s balance sheet. The bank receives interest on assets, pays interest on some funding sources, and also earns fees for financial services. Its earnings must cover operating expenses and losses as well as funding costs. (imf.org)
Financing through a financial market may involve investors purchasing a company’s bonds or shares. Such financing can still depend on intermediaries that arrange issuance, execute transactions, or manage investment portfolios. Consequently, direct financing and intermediation are not mutually exclusive descriptions of an entire financial system. Banks themselves can combine lending with brokerage, securities distribution, and asset management. (imf.org)
Nonbank financial intermediation encompasses diverse institutions and activities, including investment funds, pension funds, insurers, and finance companies. The narrower concept of shadow banking concerns credit intermediation outside traditional banking that may reproduce bank-like vulnerabilities. It should not be interpreted as meaning that every nonbank institution is unregulated or undertakes the same risks. (data.bis.org)
Information, screening, and monitoring
An important economic explanation for intermediaries is information asymmetry: borrowers often know more about their projects and repayment prospects than outside financiers. Before lending, this can create adverse selection, because lenders cannot readily distinguish stronger applicants from weaker ones. After financing, moral hazard can arise if borrowers take actions that increase creditors’ risks. Intermediaries develop expertise in evaluating applicants and supervising financed activities. (elibrary.imf.org)
Through delegated monitoring, many investors entrust oversight to one intermediary instead of separately investigating the same borrower. This can reduce duplicated effort and transaction costs. Douglas Diamond’s 1984 theoretical work explained how diversified intermediaries can make such delegation economical, while also addressing the problem of ensuring that the intermediary performs its monitoring role. Monitoring remains costly and cannot eliminate uncertainty about repayment. (nobelprize.org)
Transformation of financial claims
Intermediaries reconcile differences between the funding providers want to supply and the financing borrowers need. Pooling numerous relatively small deposits can support larger loans. Maturity transformation occurs when an institution funds longer-term assets with shorter-term liabilities, allowing borrowers to finance durable investments without requiring every funder to commit for the same period. (imf.org)
Liquidity transformation offers creditors relatively accessible claims while financing assets that cannot easily be sold or repaid immediately. This provides liquidity services but creates exposure to withdrawals. Diversification and monitoring can manage credit risk, while bank capital absorbs losses. These arrangements redistribute or cushion risks; they do not make the underlying risks disappear. (nobelprize.org)
Through securitization, loans or other financial assets can be packaged into securities sold to investors. Different institutions may originate loans, structure securities, provide funding, and hold the resulting exposures. This separates functions previously concentrated within one institution, but it can also make the location of risks and the connections between institutions harder to identify. (imf.org)
Banking and money creation
The description of banks as intermediaries must be distinguished from the claim that they simply lend out previously deposited savings. When a commercial bank grants a loan and credits the borrower’s account, it typically records both a new loan asset and a matching deposit liability. This creates deposit money, rather than merely reallocating an existing deposit. Repayment of loan principal reverses this process. (bankofengland.co.uk)
Money creation does not remove financial constraints. Banks must meet payments to other banks using settlement assets, obtain appropriate funding, maintain capital, and satisfy regulatory requirements. Lending also depends on profitability and demand from creditworthy borrowers. A central bank influences these conditions through monetary policy, including its effect on interest rates. Deposit creation therefore coexists with funding, liquidity, and solvency constraints. (bankofengland.co.uk)
Fragility and public oversight
Short-term funding of illiquid assets creates vulnerability to a bank run. If creditors expect others to withdraw, withdrawing early may become individually attractive even when the institution’s long-term assets are fundamentally sound. Forced asset sales can turn liquidity pressures into losses. Nonbank institutions can experience related stresses through investor redemptions, leverage, and deteriorating market liquidity. (nobelprize.org)
Deposit insurance and a lender of last resort can reduce incentives for destabilizing withdrawals. Prudential frameworks, including the Basel Accords, address capital adequacy, liquidity, leverage, supervision, and disclosure. Macroprudential policy additionally examines vulnerabilities across institutions and markets, since individually rational responses—such as simultaneous asset sales—can amplify system-wide stress. Oversight therefore concerns both individual intermediaries and their interconnected funding relationships. (nobelprize.org)