FX.co ★ Yield on U.S. 4-Week Bills Edges Lower to 3.615% in Latest Auction

The yield on the U.S. 4-week Treasury bill slipped modestly in the latest auction, with the rate coming in at 3.615%, down from the previous 3.640%. The updated figure reflects data as of 19 March 2026.

The slight decline suggests a marginal easing in very short-term funding costs for the U.S. government and may indicate steady demand for ultra-short-duration government securities. While the move is small, shifts in bill yields are closely watched by money market participants and short-term investors as a barometer of immediate-rate expectations and liquidity conditions in the U.S. financial system.