Silicon Valley Bank Collapse: A Bank Run in Hours

Key Takeaways

• Silicon Valley Bank failed on March 10, 2023 with about $209 billion in assets.
• Rate hikes sank its long-dated bond holdings, leaving roughly $16 billion in unrealized losses.
• Depositors pulled about $42 billion in one day, nearly a quarter of all deposits.
• Regulators guaranteed all deposits and launched the Bank Term Funding Program to stop contagion.

Background

Silicon Valley Bank was the banker of the startup economy. For four decades it specialized in lending to and holding the cash of technology and life-sciences companies and the venture-capital funds behind them. By the end of 2022 it was the 16th-largest bank in the United States, with about $209 billion in assets.

Its growth in the pandemic boom was extreme. As venture funding flooded into startups, those companies parked their cash at SVB. In just three years starting in 2019, the bank roughly tripled its assets, from about $71 billion to $212 billion, far outpacing peers. A 2023 GAO review found SVB's assets grew 198 percent from 2019 to 2021, against a median of 33 percent for a group of 19 peer banks.

That flood of deposits had two features that would prove fatal. First, the money was concentrated in one industry, so SVB's customers tended to move in the same direction at the same time. Second, the balances were large. According to FDIC testimony, about 88 percent of SVB's deposits were above the $250,000 federal insurance limit, meaning most of the bank's funding could legally flee at any sign of trouble.

To earn a return on all that cash, SVB bought bonds. Of roughly $117 billion in marketable securities, it classified about $91 billion as held-to-maturity (HTM) and about $26 billion as available-for-sale (AFS). These were high-quality US Treasuries and agency mortgage-backed securities with no real credit risk. The problem was their duration: the bank had loaded up on long-dated bonds when interest rates were near zero, and over 2022 it extended the portfolio's duration further.

What Happened

The setup held only while interest rates stayed low. When the Federal Reserve raised its policy rate from near zero in March 2022 to above 4.5 percent by early 2023, the market value of SVB's long bonds fell sharply. The fall did not show in reported capital because HTM securities are carried at cost, but the economic hole was real and growing.

• 2022: Rising rates push SVB's unrealized securities losses to roughly $16 billion, while tech clients burn cash and deposits start shrinking.
• March 8, 2023: SVB announces it sold substantially all of its AFS securities at a loss of about $1.8 billion and plans to raise roughly $2 billion in fresh capital.
• March 9, 2023: Word races through venture-capital networks; depositors try to withdraw about $42 billion in one day, close to a quarter of total deposits.
• March 10, 2023: With far more withdrawals queued and the bank short of cash, California regulators close SVB at 11:15 a.m. EST and name the FDIC receiver.
• March 12, 2023: US authorities invoke the systemic-risk exception, guaranteeing all SVB deposits, and launch the Bank Term Funding Program; Signature Bank (about $110 billion in assets) is closed the same day.
• March 13, 2023: A bridge bank reopens SVB for normal operations so depositors can access their money.

The capital raise on March 8 was meant to reassure markets. It did the opposite. Investors and depositors read the forced bond sale as a sign the bank was in trouble, and in a customer base wired together through group chats and social media, fear spread in minutes rather than days. The Federal Reserve's later review described it as a new kind of event, a bank run moving at the speed of the internet.

What made March 9 unlike any prior run was the medium. Depositors did not line up at branches; they sent wire instructions and tapped apps. By the close, SVB had a large negative cash balance and could not meet the next morning's expected outflows. The seizure followed at mid-morning on March 10.

The shock did not stop at SVB. Signature Bank, with heavy uninsured deposits and crypto-sector exposure, suffered its own run and was closed two days later. Weeks afterward, regional lender First Republic Bank, with about $229 billion in assets, was seized and sold to JPMorgan Chase on May 1, 2023, the second-largest bank failure in US history.

Why It Happened

SVB failed from a combination of interest-rate risk, a concentrated and uninsured deposit base, and a run that moved faster than any rulebook assumed. The Fed's vice chair for supervision, Michael Barr, summarized the bank-level cause bluntly, calling SVB's failure "a textbook case of mismanagement."

Start with the asset side. SVB held long-duration bonds bought at low yields. When rates rose, those bonds lost market value. Because most sat in the HTM bucket, accounting rules let the bank avoid marking them down against regulatory capital. That treatment changed the timing of the loss, not the economic reality. The bank looked adequately capitalized on paper while carrying roughly $16 billion of unrealized losses underneath.

Now the funding side. A bank can hold underwater bonds indefinitely if it never has to sell them. SVB lost that luxury because its deposits were unstable. With about 88 percent uninsured and concentrated in one cash-burning industry, the funding could leave fast and all at once. When deposits shrank through 2022, the bank had to sell the AFS book and crystallize the $1.8 billion loss, which is what it disclosed on March 8.

That disclosure converted a slow problem into an instant one. Selling bonds at a loss to fund withdrawals depletes capital, which makes the bank look weaker, which prompts more withdrawals. This is the classic duration-mismatch run first modeled by Diamond and Dybvig in 1983, whose authors won the Nobel Prize in October 2022, four months before SVB proved their point. The new ingredient in 2023 was velocity. Information and money both moved in real time, compressing into hours a process that historically unfolded over days.

Supervision was the final gap. The Barr Report acknowledged that Federal Reserve supervisors identified weaknesses at SVB but did not force fixes fast enough, and that a 2018 tailoring of rules for mid-sized banks had eased the oversight applied to firms of SVB's size. The bank's own risk management, including long stretches without a chief risk officer, drew the harshest criticism.

By the Numbers

• Total assets at failure: about $209 billion; SVB was the 16th-largest US bank and the largest to fail since 2008. (FDIC testimony; GAO)
• Asset growth: roughly $71 billion in 2019 to about $212 billion in 2021, a 198 percent rise versus a 33 percent peer median. (Cecchetti & Schoenholtz; GAO)
• Securities book: about $117 billion total, split roughly $91 billion HTM and $26 billion AFS. (Cecchetti & Schoenholtz)
• Unrealized losses: about $16 billion, largely hidden in the HTM portfolio. (Cecchetti & Schoenholtz)
• Uninsured deposits: about 88 percent of SVB deposits exceeded the $250,000 insurance cap. (FDIC testimony)
• March 8 disclosure: an AFS sale at about a $1.8 billion loss, plus a planned ~$2 billion capital raise. (Contemporaneous reporting)
• The run: about $42 billion withdrawn on March 9, nearly 25 percent of deposits, with more queued for March 10. (GAO; contemporaneous reporting)
• Signature Bank: about $110 billion in assets, roughly 90 percent uninsured, closed March 12, 2023. (FDIC testimony)
• First Republic: about $229 billion in assets, seized and sold to JPMorgan on May 1, 2023. (CNBC)
• DIF cost: an estimated $20 billion for SVB and $2.5 billion for Signature, with a $16.3 billion special assessment to recover the uninsured-deposit portion. (FDIC testimony; FDIC final-rule fact sheet)

Aftermath

The response was fast and large. On March 12, 2023, the Treasury Secretary, the Federal Reserve, and the FDIC invoked the statutory systemic-risk exception to least-cost resolution, guaranteeing all deposits at both SVB and Signature, insured and uninsured. Bridge banks reopened both institutions on March 13 so customers could reach their cash and the panic could ease.

The same day, the Federal Reserve created the Bank Term Funding Program (BTFP). It offered loans of up to one year against US Treasuries, agency debt, and agency mortgage-backed securities, and critically it valued that collateral "at par," at face value rather than depressed market prices. That let other banks borrow against underwater bonds without having to sell them at a loss, removing the exact pressure that had toppled SVB. The Treasury made up to $25 billion available from the Exchange Stabilization Fund as a backstop. Fed researchers later judged that the BTFP "helped to avert a potential systemic banking crisis."

Then came the bill and the inquiry. The FDIC estimated the failures would cost its Deposit Insurance Fund about $20 billion for SVB and $2.5 billion for Signature. In November 2023 it finalized a special assessment to recover roughly $16.3 billion tied to protecting uninsured depositors, charged mainly to the largest banks rather than to taxpayers. The Fed's April 2023 Barr Report and the GAO review both faulted bank management and supervisory lapses, and the episode reopened debate over the 2018 easing of rules for mid-sized banks.

No criminal charges defined this episode the way they did some earlier failures. The Department of Justice and SEC opened investigations into SVB and certain insider stock sales, but the central outcomes were the receiverships, the asset sales (SVB's deposits and most loans went to First Citizens BancShares in late March 2023), the special assessment, and a wave of proposed rule changes on capital, liquidity, and the treatment of unrealized securities losses.

Lessons for Investors

1. Accounting can hide economic losses, not remove them. SVB carried roughly $16 billion of bond losses that never touched its reported capital because the bonds sat in the held-to-maturity bucket. The hole was real the whole time. When you study a bank or any leveraged balance sheet, look past the headline capital ratio and read the footnotes on unrealized gains and losses.

2. Funding stability matters more than asset quality. SVB's bonds were high-grade Treasuries and agency paper with no credit problem. The bank still died, because about 88 percent of its deposits were uninsured and could leave at will. Where the money comes from, and how easily it can run, often decides survival before the assets ever do.

3. Concentration turns a customer base into a single trade. SVB banked one industry, so its depositors panicked together. A diversified, sticky, mostly insured deposit base behaves nothing like a few thousand venture-backed startups in a group chat. Treat concentration, in customers, sectors, or counterparties, as a risk in its own right.

4. Runs now move at internet speed. The $42 billion that left in a day was possible because information and wire transfers travel in real time. Old assumptions about how long a bank has to find a buyer or raise capital no longer hold. Speed itself is now a risk factor to price in.

5. Do not assume a rescue you have not been promised. Uninsured depositors at SVB were made whole, but only after an emergency systemic-risk vote that was not guaranteed in advance and remains contested. Counting on a backstop that no rule requires is a bet, not a plan. Manage exposure as if no rescue is coming.

Frequently Asked Questions

What was the Silicon Valley Bank collapse in simple terms? The Silicon Valley Bank collapse was the March 10, 2023 failure of a roughly $209 billion US bank that served the tech and venture-capital world. A surprise bond loss triggered a record-fast deposit run, and regulators seized the bank within two days.

Why did the Silicon Valley Bank collapse happen? SVB had bought long-dated bonds at low yields, and when the Fed raised rates those bonds fell in value, leaving about $16 billion in unrealized losses. Its deposits were heavily uninsured and concentrated in tech, so a single bad disclosure sparked a $42 billion run that the bank could not survive.

How much money was lost in the Silicon Valley Bank collapse? Depositors tried to pull about $42 billion in one day, and the FDIC estimated SVB's failure would cost its Deposit Insurance Fund roughly $20 billion. The FDIC later levied a $16.3 billion special assessment on banks to recover the cost of protecting uninsured depositors at SVB and Signature.

Could a Silicon Valley Bank-style collapse happen again today? The Bank Term Funding Program addressed the immediate trigger by letting banks borrow against underwater bonds at par, and regulators proposed tougher capital and liquidity rules. Yet interest-rate risk, uninsured-deposit concentration, and the new speed of digital runs all remain, so the underlying pattern is not gone.

What is the main lesson from the Silicon Valley Bank collapse? A bank can be solvent by its own accounting and still fail within days if its funding can run faster than it can raise cash. Stable, diversified, insured funding matters more than the credit quality of the assets it holds.

Sources

1. Federal Reserve. Review of the Supervision and Regulation of Silicon Valley Bank (Barr Report). April 28, 2023. https://www.federalreserve.gov/publications/files/svb-review-20230428.pdf
2. FDIC. Recent Bank Failures and the Federal Regulatory Response (Chairman Martin Gruenberg testimony). March 27, 2023. https://www.fdic.gov/news/speeches/2023/spmar2723.html
3. U.S. Government Accountability Office. Bank Regulation: Preliminary Review of Agency Actions Related to March 2023 Bank Failures (GAO-23-106736). https://www.gao.gov/products/gao-23-106736
4. Federal Reserve Board. Bank Term Funding Program press release. March 12, 2023. https://www.federalreserve.gov/newsevents/pressreleases/monetary20230312a.htm
5. FDIC. Special Assessment Pursuant to Systemic Risk Determination, Final Rule Fact Sheet. November 16, 2023. https://www.fdic.gov/news/fact-sheets/special-assessment-final-rule-11-07-23.html
6. Federal Reserve. The Federal Reserve's Response to the 2023 Banking Turmoil: The Bank Term Funding Program. https://www.federalreserve.gov/econres/feds/the-federal-reserves-response-to-the-2023-banking-turmoil-the-bank-term-funding-program.htm
7. Cecchetti, S. and Schoenholtz, K. The Extraordinary Failures Exposed by Silicon Valley Bank's Collapse. Money, Banking and Financial Markets. March 20, 2023. https://www.moneyandbanking.com/commentary/2023/3/20/the-extraordinary-failures-exposed-by-silicon-valley-banks-collapse
8. CNBC. JPMorgan Chase takes over First Republic after biggest U.S. bank failure since 2008. May 1, 2023. https://www.cnbc.com/2023/05/01/first-republic-bank-failure.html

Disclaimer

This article is educational content only and is not financial advice. Nothing here is a recommendation to buy, sell, or hold any security. Consult a licensed advisor before making investment decisions.