The yield on the latest 4-week U.S. Treasury bill auction slipped below the 4% mark, with the rate coming in at 3.945% on 22 October 2026. This marks a decline from the previous auction, where the short-term government debt instrument stopped at 4.000%.
The move suggests a modest softening in very short-term borrowing costs for the U.S. government, as demand and rate expectations in the front end of the yield curve adjust. While the change is incremental, the drop back under 4% is notable for market participants closely tracking shifts in short-term funding and cash management instruments.
