FX.co ★ U.S. 8-Week Bill Auction Yield Edges Up to 3.640% on June 18, 2026

The yield on the United States 8-week Treasury bill inched higher at the latest auction, with the rate closing at 3.640% on June 18, 2026. This marks a slight increase from the previous auction’s stop-out yield of 3.610%.

The uptick suggests a modest rise in short-term borrowing costs for the U.S. government and may reflect incremental shifts in investor expectations around near-term interest rate dynamics and liquidity conditions. While the move is small in absolute terms, such changes in bill yields are closely monitored by market participants as a barometer of short-term funding costs and demand for low-risk government securities.