The yield on the U.S. 8-week Treasury bill climbed to 3.990%, up from the previous auction’s 3.920%, according to data updated on 24 September 2026. The move marks a modest rise in short-term borrowing costs for the U.S. government.
The increase in the 8-week bill rate signals slightly higher returns for investors seeking short-duration government debt, while also reflecting marginally tighter conditions at the very short end of the yield curve. With Treasury bills closely watched as a proxy for near-term interest rate expectations and liquidity dynamics, the latest auction result will be monitored for any further signs of upward pressure in short-term funding costs.