
A bank run occurs when a large number of customers withdraw their deposits at the same time due to concerns about the bank's financial stability and solvency. This phenomenon is often driven by panic and fear rather than actual insolvency, as customers rush to retrieve their money based on fears that the institution will become insolvent. Bank runs can be triggered by various factors, such as economic conditions, social media speculation, or bank mismanagement, and they have occurred throughout history, including during the Great Depression and more recently in 2023 with the collapse of Silicon Valley Bank. While bank runs are uncommon today due to federal deposit insurance, they can still occur and pose a significant risk to financial institutions.
| Characteristics | Values |
|---|---|
| Definition | A bank run occurs when a large number of customers withdraw their money from a bank at the same time due to concerns about the bank's financial stability and solvency. |
| Cause | Typically, a bank run is driven by customer panic and fear rather than a bank's actual financial status. Speculation, rumours, and official communications from the bank can spread concerns about a bank's financial health. |
| Impact | As more people withdraw their funds, the probability of default increases, which can further trigger withdrawals. This can deplete a bank's cash reserves and lead to bankruptcy. |
| Prevention | The Federal Deposit Insurance Corporation (FDIC) was created in 1933/1934 to insure bank deposits and reduce the likelihood of bank runs. Reserve requirements were also established to mandate that banks maintain a certain percentage of total deposits as cash on hand. |
| Examples | Notable examples of bank runs include the Great Depression (1929-1939), Silicon Valley Bank (March 2023), Washington Mutual Bank (2008), and Northern Rock (2008). |
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What You'll Learn

Causes of a bank run
A bank run occurs when a large number of customers withdraw their deposits at the same time due to concerns about the bank's financial stability and its ability to remain solvent. This panic can be triggered by various factors, including:
Fear and Speculation: The biggest driver of a bank run is often fear and speculation about a bank's financial health. This can be fuelled by official communications from the bank, news reports, or social media posts, creating a self-fulfilling prophecy where the very act of withdrawing funds pushes the bank closer to insolvency.
Economic Conditions: Economic downturns or specific industry crises can spark a bank run. For example, the 2008 financial crisis centred around market-liquidity failures, and the Great Depression of the 1930s was exacerbated by bank runs.
Bank Mismanagement: In some cases, bank mismanagement can contribute to a run. For instance, Washington Mutual Bank's (WaMu) failure in 2008 was partly due to its focus on high-risk mortgages, which led to a loss of confidence among its customers.
Domino Effect: A bank run at one institution can trigger runs at other banks as depositors seek to protect their funds. This can lead to a systemic banking crisis, where a chain of bankruptcies causes a prolonged economic recession.
Technology and Speed: In the digital age, bank runs can escalate quickly due to the ease and speed of electronic fund transfers. Customers no longer need to physically visit a branch to withdraw their money, allowing a run to happen in a matter of hours.
While these are some of the key causes of bank runs, it's worth noting that modern regulations, deposit insurance schemes, and government interventions have made bank runs less frequent and less devastating than in the past.
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Effects of a bank run
A bank run can have several effects on the financial institution in question, as well as the wider economy.
Firstly, a bank run can cause a bank to face sudden bankruptcy. As more people withdraw their money, the bank's cash reserves deplete, and the likelihood of default increases, triggering further withdrawals. This can create a domino effect, with the bank eventually running out of cash and facing bankruptcy.
Secondly, bank runs can lead to a loss of confidence in the banking system as a whole. Depositors may lose trust in the safety of their funds, leading to a run on other banks as individuals rush to withdraw their money. This can result in a systemic banking crisis, where all or almost all of the banking capital in a country is wiped out, causing a long economic recession as businesses and consumers are starved of capital.
Additionally, during a bank run, the bank may be forced to sell its assets quickly, often at significantly lower prices, to increase its cash position. This can further fuel customer concerns and trigger more withdrawals.
Furthermore, in the digital age, bank runs can escalate rapidly due to the ease and speed of electronic money transfers. Social media can also play a role in spreading concerns about a bank's financial health, accelerating the pace of a bank run.
Finally, while bank runs are rare due to the implementation of deposit insurance and federal guarantees, they can still occur. For example, the 2023 collapse of Silicon Valley Bank was caused by a bank run, demonstrating that even in the modern era, banks are susceptible to the effects of bank runs.
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Historical examples
A bank run, also known as a run on the bank, occurs when numerous customers withdraw their money from a bank at the same time, typically due to fears about the bank's solvency or financial stability. This can lead to a self-fulfilling prophecy, where as more people withdraw cash, the likelihood of the bank defaulting increases, triggering further withdrawals and potentially pushing the bank into bankruptcy.
The Great Depression (1929-1939)
The Great Depression was a period of economic crisis that began with the stock market crash of 1929. This event incited widespread mistrust in the financial system, as it was revealed that many banks were using deposits to fund speculative investments in the stock market. As a result, there were massive bank runs and hundreds of bank failures across the United States. This period saw several banking crises consisting of runs on multiple banks, particularly in states with laws allowing single-branch banking. The Federal Deposit Insurance Corporation (FDIC) was established in 1933 or 1934 to restore trust in the banking system and protect depositors' funds.
2008 Financial Crisis
The 2008 financial crisis was centred around market-liquidity failures and included a wave of bank nationalizations, such as Northern Rock in the UK and IndyMac in the US. This crisis was caused by low-interest rates stimulating an asset-price bubble and the failure of new financial products that had not been stress-tested.
Silicon Valley Bank (March 2023)
Silicon Valley Bank experienced a run on deposits when stock prices plummeted, and customers withdrew $42 billion from the bank in a single day. This occurred after the bank reported a loss of nearly $2 billion in assets, leading to its closure by state regulators the following day. The Federal Deposit Insurance Corporation (FDIC) covered all deposits, despite most of them being uninsured.
Other Historical Examples
- Dutch tulip manias (1634-1637)
- British South Sea Bubble (1717-1719)
- French Mississippi Company (1717-1720)
- Post-Napoleonic depression (1815-1830)
- Savings and Loan Crisis (caused by interest-rate risk and loan concentrations)
- Blackmail of the British government in 1832 by reformers angry at the Duke of Wellington's overturning of a majority government to prevent reform.
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Preventing bank runs
Bank runs occur when a large number of customers simultaneously withdraw their money from a bank, typically due to fears about the bank's financial stability and potential insolvency. This can create a self-fulfilling prophecy, as increasing withdrawals deplete a bank's cash reserves, potentially leading to bankruptcy. To prevent bank runs, several measures have been implemented over the years:
Higher Reserve Requirements
One approach is to mandate that banks maintain a higher proportion of their total deposits as cash reserves. While this strategy was employed in the past, the Federal Reserve has since reduced this requirement to zero due to the development of alternative monetary policy tools.
Deposit Insurance
The Federal Deposit Insurance Corporation (FDIC) was established in 1933 to insure bank deposits and maintain stability in the financial system. FDIC insurance covers up to $250,000 per depositor, per bank, for each account ownership category. This assurance helps maintain public confidence and prevents panic-induced bank runs.
Central Bank as Lender of Last Resort
Central banks, such as the Federal Reserve, can play a crucial role in preventing bank runs by acting as a lender of last resort. They can provide loans to struggling banks, helping them meet their obligations and avoid bankruptcy.
Supervision and Regulation
Increased supervision and regulation of commercial banks can also mitigate the risk of bank runs. This includes regular inspections to ensure banks' solvency and compliance with financial regulations.
Temporary Suspension of Withdrawals
In some cases, banks may need to take proactive measures, such as temporarily suspending withdrawals or even closing their doors to prevent customers from withdrawing their money en masse. This tactic buys time and can help slow down the bank run.
Accessing Short-Term Liquidity
When faced with a bank run, institutions should work with authorities to access short-term liquidity or raise equity to meet withdrawal demands. This can involve borrowing money from other banks or the central bank to prevent bankruptcy.
Managing Customer Confidence
Bank runs are often driven by customer panic and a loss of trust. Proactive communication and transparency from banks can help manage customer expectations and prevent rumours or speculation from escalating into a full-blown bank run.
By employing these strategies and maintaining robust banking systems, governments and financial institutions can work together to prevent bank runs and protect the interests of depositors.
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Bank run on a single institution vs the banking system
A bank run occurs when a large number of customers withdraw their money from a bank simultaneously due to concerns about the bank's financial stability and solvency. This panic behaviour can be triggered by various factors, such as official communications from the bank, news reports, social media posts, or even mismanagement by the bank. While banks keep a small proportion of their assets as cash, a sudden surge in withdrawals can deplete their reserves, leading to a self-fulfilling prophecy of bankruptcy.
Bank runs typically affect a single financial institution, and since the Great Depression, they have become less frequent due to federal insurance of deposits. However, a bank run on one institution can have spillover effects on the entire banking system. This occurs when depositors withdraw their funds and choose one of three options: direct redeposit into another bank, purchasing treasury securities, or holding the funds outside the banking system. If a significant number of depositors opt for the third option, it can result in a run on the banking system, causing an outflow of currency and impacting economic activity.
The introduction of deposit insurance and government agencies like the Federal Deposit Insurance Corporation (FDIC) in the U.S. has played a crucial role in mitigating the risk of bank runs. FDIC-insured bank accounts provide assurance to depositors that their money is safe, even in the event of a bank failure. The FDIC insures deposits up to a certain limit per depositor, per bank, and per account ownership category. This measure helps maintain public confidence in the financial system and prevents panic-induced bank runs.
While bank runs on a single institution have become less common, they still occur occasionally, often triggered by unique circumstances. For example, the 2023 bank run on Silicon Valley Bank was caused by a combination of factors, including venture capitalists withdrawing funds, negative social media sentiments, and the bank's loss of assets. Despite the rarity of bank failures, it is advisable for depositors to stay informed and consider the FDIC insurance limits when choosing a financial institution.
In conclusion, while bank runs on a single institution have historically been more prevalent, the potential spillover effects on the entire banking system cannot be overlooked. The implementation of deposit insurance and regulatory measures has helped reduce the frequency and impact of bank runs. Nonetheless, the recent Silicon Valley Bank run serves as a reminder that unique circumstances and customer panic can still ignite isolated incidents of bank runs.
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Frequently asked questions
A run on a bank, or bank run, occurs when a large number of customers withdraw their money from a bank at the same time due to concerns about the bank's financial stability and fear that the institution will become insolvent.
Bank runs are typically triggered by customer panic and fear that a bank may become insolvent. This fear can be driven by various factors, such as negative news reports, social media posts, or bank mismanagement. In some cases, it may be a self-fulfilling prophecy, as the more people withdraw cash, the more likely the bank is to default, triggering further withdrawals.
A bank run can destabilize a bank and lead to sudden bankruptcy if the bank's cash reserves are depleted. This can have a domino effect on the economy, causing a long economic recession as businesses and consumers are starved of capital.
The Federal Deposit Insurance Corporation (FDIC) was created in 1933/1934 to help reduce the likelihood of bank runs and protect customers in the event of a bank failure. The FDIC insures deposits in member banks up to $250,000 per depositor, per bank, for each account ownership category.











































