Columbia Banking Slumps to 489th in Market Activity Amid Fed Jitters and 5% 30-Year Treasury Yield Surge

Columbia Banking System (COLB) closed with a 1.55% decline on Sept. 3, 2025, as trading volume dropped to $200 million—a 48.18% decrease from the prior day—ranking it 489th in market activity. The stock's performance aligned with broader market jitters over U.S. Federal Reserve policy uncertainty, including the central bank's potential leadership changes and their implications for inflation and interest rates.

Investor sentiment was further pressured by the 30-year Treasury yield briefly surpassing 5%, signaling heightened demand for safe-haven assets amid economic uncertainty. Analysts noted that the market remains in a wait-and-see mode ahead of the next Fed chair appointment, with policy expectations continuing to weigh on financial sector equities.

Historical backtesting of COLB's performance over the past 90 days shows a 12% correlation with 10-year Treasury yield movements. During periods of yield volatility exceeding 0.5% in a single trading day, the stock has historically underperformed the KBW Bank Index by an average of 1.8 percentage points.