The 2023 Regional Bank Turmoil
The failures of Silicon Valley Bank (SVB), Signature Bank, and First Republic Bank in the spring of 2023 demonstrated that the post-2008 regulatory framework had not eliminated all paths to bank failure. These were not subprime lending blowups or fraud cases. They were well-known institutions undone by a combination of interest rate risk, deposit concentration, and the unprecedented speed of modern bank runs.
What Happened at SVB
Silicon Valley Bank had grown rapidly during the technology boom of 2020-2021, taking in massive deposits from venture capital firms and their portfolio companies. Rather than lending these deposits out, SVB invested heavily in long-duration Treasury and agency mortgage-backed securities when rates were near historic lows.
When the Federal Reserve began raising rates aggressively in 2022, the market value of those securities fell sharply. SVB's held-to-maturity portfolio carried unrealized losses exceeding $15 billion by late 2022, an amount larger than the bank's total equity. The losses were unrealized (not recognized in earnings or capital ratios under accounting rules), but they were real.
When SVB attempted to raise capital in March 2023, it had to disclose realized losses from selling part of its securities portfolio. The announcement triggered panic among its depositor base, which was extraordinarily concentrated: roughly 94% of deposits were uninsured, held by a tightly networked community of tech companies and venture funds. Depositors withdrew $42 billion in a single day. The FDIC seized SVB the following morning.
Signature and First Republic
Signature Bank faced a similar dynamic. It had concentrated deposit relationships with cryptocurrency firms and real estate investors, and uninsured deposits exceeded 90% of its total. When contagion fears spread from SVB, Signature experienced its own rapid deposit outflows and was closed by regulators within days.
First Republic's failure unfolded more slowly but followed the same pattern. The bank served high-net-worth clients with large uninsured deposit balances and held a portfolio of low-rate residential mortgages that had lost significant value. Despite receiving a $30 billion deposit infusion from a consortium of large banks, First Republic could not stem the outflow. It was seized by the FDIC and sold to JPMorgan Chase in May 2023.
Why It Happened So Fast
The 2023 failures were the fastest bank runs in history. Digital banking meant depositors could move millions with a few clicks rather than standing in line at a branch. Social media amplified fear in real time, with Twitter threads and group chats among SVB's depositor community spreading panic within hours.
The speed overwhelmed traditional crisis management tools. By the time management could issue reassuring statements or regulators could assess the situation, the deposits were already gone.
Lessons for Investors
The 2023 episode reinforced several principles. Unrealized losses are real losses if the bank is forced to sell. Uninsured deposit concentration creates run risk that can be fatal regardless of the bank's underlying solvency. And interest rate risk can destroy a bank as quickly as credit risk, something the banking industry had not experienced at this scale in decades.
For screening purposes, the key metrics are the ratio of uninsured deposits to total deposits, the size of unrealized securities losses relative to equity, and the overall duration gap of the balance sheet. Banks that score poorly on all three carry the same structural vulnerabilities that brought down SVB.
Related Articles
- The 2008 Financial Crisis — The 2008 and 2023 crises had different triggers but shared the theme of concentrated risk
- Early Warning Signs of Bank Failure — SVB exhibited multiple classic warning signs well before the failure
- The Savings & Loan Crisis — The S&L crisis was also driven by interest rate mismatches, though at a different scale
Related Metrics
- Equity to Assets Ratio — Unrealized losses that exceed equity render the bank economically insolvent even if accounting rules mask it
- Tangible Common Equity (TCE) Ratio — Tangible capital adjusted for unrealized losses was the real measure of SVB's condition
- Deposits to Assets Ratio — Rapid deposit growth without corresponding loan deployment led to excess securities purchases