Liquidity, in economics and finance, describes the ease with which an asset can be exchanged for money quickly and at low cost, or an institution can obtain funds to meet payments when due. It concerns both the functioning of financial markets and the financial position of individual organizations. Liquidity is not simply the amount of wealth held: valuable assets may be difficult to sell, and an institution may face payment difficulties despite owning assets worth more than its liabilities. (newyorkfed.org)
Main forms
Market liquidity is the ability to buy or sell an asset promptly, in a meaningful quantity, without substantially changing its price. Costs include brokerage fees, the difference between buying and selling prices, and the price movement caused by the transaction itself. Liquidity therefore depends on transaction size and prevailing market conditions, rather than being an unchanging property of an asset. (newyorkfed.org)
Funding liquidity is the ability to obtain cash, including through secured or unsecured borrowing. For a bank, this means being able to finance assets and meet withdrawals, debt repayments, and other obligations without unacceptable losses. Funding liquidity depends on available cash, access to lenders, and assets that can be pledged as collateral. (newyorkfed.org)
Monetary liquidity refers more broadly to monetary aggregates or central-bank funds available to the banking system. It is related to, but not interchangeable with, market and funding liquidity. An increase in the money supply does not guarantee that a particular security will be easy to sell or that every borrower will obtain financing. (elibrary.imf.org)
Dimensions and measurement
Market liquidity has several dimensions. Tightness concerns the cost of completing a transaction; depth concerns the quantity that can be traded around prevailing prices; immediacy concerns execution and settlement speed; and resilience concerns how quickly trading imbalances and temporary price disturbances dissipate. These dimensions can change independently. (elibrary.imf.org)
A common indicator is the bid–ask spread, the difference between the highest quoted buying price and the lowest quoted selling price. A narrower spread generally indicates lower immediate trading costs. Quoted depth measures the quantity available at specified prices, while price-impact measures estimate how much prices respond to transactions. Researchers often combine indicators because no single measure captures every aspect of liquidity. (newyorkfed.org)
Trading volume alone is insufficient: extensive trading can coexist with large price movements or shallow quoted depth. Research on the US Treasury market combines spreads, depth, and price impact to distinguish different liquidity conditions. Its evidence identifies substantial deterioration in March 2020, comparable on the study’s index to conditions during the 2007–2009 financial crisis. (newyorkfed.org)
For companies, financial-statement analysis uses measures such as working capital, defined as current assets minus current liabilities, and the current ratio, current assets divided by current liabilities. These describe short-term financial resources, but cash-flow statements remain important because accounting income and cash generation are different. The interpretation of financial ratios also varies across industries. (sec.gov)
Market structure and provision
Liquidity provision depends on intermediaries’ funding capacity, willingness to bear risk, and ability to match buyers with sellers. Market makers facilitate transactions by quoting prices and holding inventories. Their activity requires financing and exposes them to inventory risk. Efficient trading infrastructure, lower search costs, and a diverse investor base can support liquidity. (elibrary.imf.org)
Transaction costs and information asymmetry also matter. Investors with different information, mandates, and trading constraints do not necessarily respond alike to changing conditions. Consequently, liquidity depends not only on the number of participants but also on their capacity and willingness to trade when others seek to exit. (elibrary.imf.org)
Liquidity risk and solvency
Liquidity risk is the possibility that assets cannot be sold, or funds obtained, quickly enough and on acceptable terms to meet obligations. It differs from solvency, which concerns whether an institution’s financial resources are sufficient to cover its liabilities. Bank capital absorbs losses, whereas liquid resources enable timely payments. The distinction is important, although the two problems can interact. (newyorkfed.org)
Through financial intermediation, banks commonly transform short-term deposits into longer-term loans. This maturity mismatch makes them vulnerable to withdrawals and refinancing disruptions. A bank run can produce urgent cash needs even before losses render a bank insolvent. (bis.org)
Funding and market liquidity can reinforce each other negatively. Falling asset prices may trigger margin calls, requiring borrowers to supply additional cash or collateral. Forced sales can depress prices further and reduce intermediaries’ ability to trade. These fire sales can spread stress across institutions and markets, while concerns about credit risk can make lenders less willing to extend financing. (newyorkfed.org)
Central banks and prudential standards
A central bank manages banking-system liquidity as part of monetary policy. Open market operations supply or withdraw central-bank funds to support the intended level of short-term interest rates. Bank reserves serve a different purpose from the liquid securities traded by investors, although funding conditions connect these markets. (ecb.europa.eu)
During financial stress, a central bank may act as lender of last resort. Such support can address funding disruptions, but its design must account for collateral, solvency, and moral hazard. (newyorkfed.org)
Under the Basel framework, the Liquidity Coverage Ratio compares high-quality liquid assets with projected net cash outflows over a 30-calendar-day stress scenario. Its normal minimum is 100%, although buffers may be used during stress. The Net Stable Funding Ratio compares available with required stable funding over a one-year horizon and also requires at least 100%. These quantitative standards complement cash-flow forecasting, stress testing, collateral management, and contingency funding plans. (bis.org)