FX.co ★ Yield on U.S. 4-Week Treasury Bill Edges Higher to 3.775%

The yield on the U.S. 4-week Treasury bill inched up at the latest auction, closing at 3.775%, compared with 3.700% at the previous sale. The data, updated on 10 September 2026, indicate a modest rise in short-term borrowing costs for the U.S. government.

The move reflects a slight upward adjustment in investor expectations for very short-term interest rates, as demand for the 4-week bill aligns with the current rate environment. While the increase is incremental, shifts in bill yields are closely watched by market participants as a gauge of near-term liquidity conditions and sentiment toward U.S. monetary policy.