Unrealized losses at U.S. banks have climbed back to $325 billion, reversing four straight quarters of improvement and reigniting concerns about the stability of the financial system. The Federal Deposit Insurance Corporation (FDIC) data, released this week, shows the banking industry's paper losses on investment securities have swelled as interest rates stay higher for longer.
Why the Recovery Faltered
After steadily shrinking from a peak of $688 billion in the third quarter of 2022, unrealized losses had fallen to $258 billion by the end of September 2023. The latest figure erases most of that progress. Banks are sitting on bonds and mortgage-backed securities bought when rates were near zero; as the Federal Reserve raised rates aggressively, the market value of those assets dropped. The losses remain unrealized because banks haven't sold the securities, but they still weigh on capital ratios and can spook depositors.
Interest Rate Sensitivity Exposed
The jump highlights just how exposed banks are to interest rate swings. Long-duration assets, like 10-year Treasury notes and agency mortgage bonds, have taken the biggest hit. Smaller banks, which tend to hold more of these securities relative to their capital, are especially vulnerable. The FDIC has flagged that rising unrealized losses could destabilize financial stability if a sudden run on deposits forces banks to sell at a loss.
What Regulators Are Watching
Regulators are paying close attention to the concentration of these losses. The $325 billion figure doesn't include losses from loans, which are also under pressure from higher rates and slowing economic activity. The FDIC's quarterly report notes that while the industry overall remains profitable, the margin for error is shrinking. If the Fed holds rates steady or raises them further, the paper losses could keep growing, eating into capital buffers.
The next major test will come when banks report first-quarter earnings in April. Investors and regulators will be looking at how much of those losses have been hedged and whether any institutions are at risk of crossing capital thresholds. For now, the industry is watching for any sign that the Fed might pivot — but no such signal has come.
