Bloomberg 31/Mar/2023 When the pandemic hit, and the Federal Reserve pushed down rates once again by pumping unprecedented amounts of cash into the economy, many banks loaded up on long-term government and mortgage-backed bonds. There were some Treasury notes that promised to pay annual interest of just 0.6% over 10 years.

Then inflation surged and the Fed started urgently driving up interest rates. The value of those bonds plunged, because who would want to buy an old bond paying 0.6% interest when new ones were suddenly paying more than 3%?