FX.co ★ US 4-Week Treasury Bill Yield Edges Up to 3.630% in Latest Auction

The yield on the US 4-week Treasury bill inched higher at the latest auction, with the rate rising to 3.630% from a previous level of 3.605%. The updated figure was recorded on 09 July 2026.

The modest uptick in the short-term government borrowing cost suggests a slightly firmer yield environment at the very front end of the US Treasury curve. While the move is small, changes in the 4-week bill rate are closely watched by money market participants and short-term investors as a barometer of immediate funding conditions and demand for ultra-short-duration government debt.