Silicon Valley Bank collapsed after a rapid deposit run
Equity value was effectively wiped out in days, while many regional bank shares fell sharply
What happened
Silicon Valley Bank, long known for serving startups and venture-backed companies, failed in March 2023 after a sudden loss of confidence triggered a fast-moving deposit run. As interest rates had risen, the market value of many bonds and other long-duration assets held by banks had fallen. SVB had a large exposure to this problem because it had invested heavily in longer-term securities during the low-rate era.
Why the market reacted
When SVB disclosed losses tied to asset sales and tried to raise fresh capital, depositors and investors reassessed the bank's position at the same time. A bank can appear solvent on paper yet still fail if too many depositors demand cash at once and it must sell assets at depressed prices. That is essentially what the market feared: unrealized losses becoming real, liquidity drying up, and confidence disappearing. The speed of digital banking and the concentration of SVB's depositor base made the run especially fast. The shock then spread to other regional bank stocks because investors worried that similar balance-sheet pressures and uninsured deposit risks might exist elsewhere.
The lesson
Banks are unusually sensitive to confidence. Markets do not just react to current profits; they also react to funding structure, asset-liability mismatches, and how quickly a problem can spread once customers start pulling money.
Takeaway: When confidence is central to a business model, a balance-sheet weakness can turn into a crisis far faster than headline earnings suggest.
Educational only — not investment advice. Figures are approximate and described in plain terms.