Uninsured Deposit Risk
Deposits above the $250,000 FDIC insurance limit are uninsured. If a bank fails, uninsured depositors may not recover their full balance. This creates a natural incentive for large depositors to flee at the first sign of trouble, which is exactly what happened during the regional bank stress of 2023.
Why Uninsured Deposits Are Less Stable
Insured depositors have no reason to withdraw their money during a bank crisis because the FDIC guarantees their balance up to $250,000. Uninsured depositors face real loss risk, so they monitor their bank's health more closely and act faster when concerns arise.
The speed of modern banking amplifies this dynamic. A depositor can move millions of dollars through a wire transfer or online portal in minutes. Social media can spread fear about a bank's condition in hours. The combination means that a bank with concentrated uninsured deposits can experience a deposit run faster than at any point in banking history.
The 2023 Experience
Silicon Valley Bank held roughly 94% of its deposits in uninsured accounts, concentrated among venture capital-backed technology companies that communicated actively with each other. When concerns about the bank's bond portfolio losses surfaced, depositors pulled $42 billion in a single day. Signature Bank, with similarly high uninsured deposit concentrations, failed shortly after.
First Republic Bank faced a slower but equally fatal version of the same dynamic. Its wealth management clients held large uninsured balances and withdrew steadily over several weeks despite the bank's efforts to shore up confidence.
How to Assess Exposure
Banks disclose estimated uninsured deposits in their call reports (Schedule RC-O) and sometimes in their 10-K filings. The ratio of uninsured deposits to total deposits is the key figure. The banking industry average runs roughly 35% to 45%, but the range is wide.
A bank with uninsured deposits above 50% of total deposits carries elevated run risk. Above 60% to 70%, the concentration becomes a material vulnerability. Consider the depositor profile alongside the percentage: uninsured deposits from thousands of small business operating accounts are more diversified and stable than the same dollar amount concentrated among a few dozen institutional or corporate depositors.
Mitigating Factors
Some banks manage uninsured deposit risk through reciprocal deposit networks (like IntraFi) that spread large deposits across multiple banks so each portion stays under the insurance limit. This reduces the reported uninsured percentage without losing the customer.
Others maintain collateralized deposits, particularly from municipal and government entities, where the deposits are secured by pledged securities rather than FDIC insurance. These are technically uninsured but backed by collateral, making them more stable than unsecured uninsured deposits.
When evaluating a bank, distinguish between the reported uninsured percentage and the effective exposure after accounting for these mitigating structures.
Related Articles
- Core vs. Brokered Deposits — Uninsured status is a separate risk dimension from the core vs. brokered distinction
- Bank Deposit Composition — The type of uninsured deposits matters as much as the total amount
Related Metrics
- Deposits to Assets Ratio — Total deposit funding levels provide context for uninsured deposit analysis
- Loans to Deposits Ratio — Banks with high LTD ratios and high uninsured deposits face compounded liquidity risk