Silicon Valley Bank ran out of cash because it held too much money in bonds that lost value when interest rates rose

Silicon Valley Bank (SVB) failed on March 10, 2023, because it had invested heavily in long-term bonds at a time when interest rates were low. When the Federal Reserve began raising interest rates in 2022, those bonds became worth less on the open market. SVB needed cash to cover customer withdrawals, but selling the bonds would have locked in massive losses. The bank did not have enough liquid cash on hand to meet the demand, and once customers learned about the problem, they rushed to withdraw their money all at once—a bank run—which the bank could not survive.

This was not a case of fraud or reckless lending. SVB's core business was sound: it served technology companies and venture capital firms, took their deposits, and lent money to startups. The failure came from a mismatch between what the bank owned (long-term bonds) and what it needed to pay out (when ready customer withdrawals). When that mismatch became public, the bank collapsed in days.

Key Takeaways

  • SVB invested most of its deposits in long-term bonds when interest rates were near zero, a common and legal strategy that became dangerous when rates rose.
  • Rising interest rates made those bonds worth less, but SVB did not have to sell them unless customers withdrew money faster than expected.
  • In March 2023, news of the bond losses spread, customers rushed to withdraw deposits, and SVB ran out of cash within 48 hours.
  • The Federal Deposit Insurance Corporation (FDIC) took over the bank and protected all deposits up to $250,000 per account; deposits above that amount were at risk until the government stepped in to cover them.
  • SVB's failure showed that even well-run banks can collapse if they do not keep enough liquid cash on hand for unexpected withdrawal surges.

How SVB invested its deposits and why that strategy backfired

When interest rates are low, banks face a problem: they earn very little on cash sitting in reserve. SVB solved this by buying long-term U.S. Treasury bonds and mortgage-backed securities. These are safe investments—backed by the U.S. government or mortgages—but they lock money away for years. In 2021 and early 2022, when rates were near zero, a 10-year Treasury bond might pay 1 to 2 percent per year. SVB bought billions of dollars' worth.

This strategy worked fine as long as interest rates stayed low. But in March 2022, the Federal Reserve began raising its benchmark interest rate to fight inflation. By early 2023, the same 10-year Treasury bond was paying 4 percent or more. This meant the older bonds SVB owned—paying only 1 to 2 percent—were now worth less if sold on the open market. On paper, SVB had a loss of roughly $16 billion on its bond portfolio by the end of 2022.

SVB did not need to sell those bonds as long as customers kept their money in the bank. The bonds would mature eventually, and SVB would get its full value back. The problem was that SVB's customer base—technology companies and venture capital firms—was unusually sensitive to economic conditions. When venture funding dried up in late 2022 and early 2023, these companies began withdrawing cash to pay their bills.

The bank run that happened in 48 hours

In early March 2023, SVB announced it had sold $21 billion in bonds at a loss to raise cash. This was a public admission that the bank was struggling. Customers and investors when ready realized that SVB might not have enough liquid money to cover all withdrawals. On March 9, 2023, customers withdrew $42 billion in a single day. SVB had roughly $1 billion in cash left and no way to meet the next day's withdrawals.

By the morning of March 10, 2023, SVB was insolvent—it owed more to depositors than it had in assets it could quickly convert to cash. The FDIC took control of the bank and shut it down. This was the second-largest bank failure in U.S. history, after Washington Mutual in 2008.

The speed was the shock. SVB went from a functioning bank to a closed institution in less than 48 hours. This happened because news travels when ready now, and once customers learned the bank was in trouble, they all tried to withdraw money at the same time. SVB could not meet that demand, even though its underlying assets (the bonds) were safe.

What happened to customer deposits

The FDIC insures deposits up to $250,000 per depositor, per bank account. SVB had many customers with deposits well above that limit—some technology companies had $10 million or more on deposit. Those customers faced losing everything above $250,000.

However, on March 12, 2023, the U.S. Treasury Department, the Federal Reserve, and the FDIC announced that all SVB deposits would be covered in full, regardless of amount. This was an extraordinary step, taken to prevent panic from spreading to other banks. The government did not use taxpayer money directly; instead, it created a mechanism for the FDIC to borrow against future bank insurance premiums to cover the shortfall. Customers with deposits above $250,000 were protected, but the decision was controversial because it broke the normal rule that large deposits carry risk.

Why this matters for how you think about bank safety

SVB's failure revealed that the FDIC insurance limit of $250,000 is the real boundary between protected and unprotected deposits. If you have more than $250,000 at a single bank, the amount above that limit is at risk if the bank fails—unless the government decides to step in, as it did for SVB.

For most people with ordinary checking and savings accounts, this is not a practical concern. The median American household has far less than $250,000 in liquid savings. But if you run a business, manage a trust, or have substantial cash reserves, you should know that deposits above $250,000 at one bank are not automatically protected. You can spread deposits across multiple banks to stay under the limit at each one, or use a service like IntraFi that moves your money between banks automatically to keep each deposit under $250,000.

SVB also showed that a bank can be well-managed, profitable, and still fail if it does not keep enough liquid cash on hand. The bank was not committing fraud or making reckless loans. It straightforward made a bet—that interest rates would stay low and that customers would not all withdraw money at once—and lost that bet when both assumptions changed.

The difference between a bank failure and a financial crisis

SVB's collapse was a bank failure, not a financial crisis. A bank failure means one bank runs out of money and closes. A financial crisis means the failure spreads to other banks and the whole system becomes unstable. After SVB closed, some other regional banks saw their stock prices fall and faced higher borrowing costs, but no other major bank failed. The Federal Reserve and Treasury moved quickly to prevent panic, and the system stabilized.

This distinction matters because it shows that bank failures can happen without destroying the broader economy. SVB's customers lost access to their money for a few days, but most were made whole. The bank's employees lost their jobs, and shareholders lost their investment, but depositors were protected. The system worked, even though it was tested.

What regulators learned and what changed after SVB

After SVB's failure, regulators and Congress debated whether banks should be required to hold more liquid cash and whether interest-rate risk should be monitored more closely. Some proposals would have required banks to hold more Treasury bonds and fewer long-term securities. Others focused on stress-testing banks to see how they would survive if interest rates rose or customers withdrew money suddenly.

As of late 2024, no major new regulations have been passed, though the Federal Reserve has tightened its oversight of regional banks. The debate continues about whether SVB's failure was a sign that the banking system is fragile or an isolated incident caused by SVB's specific choices.

Frequently Asked Questions

Did SVB commit fraud or break the law?

No. SVB's strategy of buying long-term bonds was legal and common among banks. The bank disclosed its bond holdings in public filings, so the losses were not hidden. SVB failed because of bad timing and a mismatch between its assets and its liabilities, not because of criminal conduct.

Could SVB have survived if it had kept more cash on hand?

Yes. If SVB had kept $50 billion or more in liquid cash instead of investing so heavily in bonds, it could have met the March 2023 withdrawals without selling bonds at a loss. The trade-off is that holding that much cash would have meant lower profits in the years before the crisis.

Did the government bail out SVB?

The government protected all deposits, which helped SVB's customers but not SVB itself. The bank still failed and was shut down. Shareholders lost their investment. The government's action was a deposit protection measure, not a bailout of the bank or its owners.

Could this happen to my bank?

Any bank could face a bank run if customers lose confidence, but most banks are larger and more diversified than SVB. Your deposits are protected up to $250,000 by the FDIC. If you have more than that, spread it across multiple banks or use a service that does this automatically.

Why did the Federal Reserve raise interest rates so fast?

The Fed raised rates to fight inflation, which had reached 40-year highs in 2022. The Fed did not anticipate that rapid rate increases would expose weaknesses in banks that held large amounts of long-term bonds. This is an ongoing debate among economists and policymakers.