FX.co ★ Yield on U.S. 4-Week Treasury Bills Eases to 3.630%

The yield on the U.S. 4-week Treasury bill slipped to 3.630%, down from the previous level of 3.730%, according to data updated on 30 July 2026. The move reflects a modest decline of 10 basis points in the short-term borrowing cost for the U.S. government.

The lower auction yield suggests investors were willing to accept slightly lower returns for very short-dated U.S. government debt compared with the prior auction. While no additional auction details were provided, the shift points to a marginal softening in short-term rates at the front end of the U.S. yield curve.