FX.co ★ U.S. 6-Month Treasury Bill Yield Climbs to 4.155%, Marking Uptick in Short-Term Funding Costs

The yield on the U.S. 6-month Treasury bill rose to 4.155% at the latest auction, up from 4.060% previously, signaling a modest increase in short-term borrowing costs for the U.S. government. The updated figure, recorded on 21 September 2026, reflects a 9.5 basis point move higher in the key short-dated benchmark.

This uptick may catch the attention of investors closely tracking the short end of the yield curve, as 6-month bills are widely used as a gauge of near-term interest rate expectations and liquidity conditions. While the move is incremental, it could influence portfolio allocation decisions for money market funds, institutional investors, and corporates managing short-term cash.