Shorter-dated U.S. Treasury yields moved lower Tuesday as oil prices fell, reflecting a shift in market expectations around inflation and interest rates. The move came as investors reacted to signs of possible diplomatic progress between the United States and Iran, a development that helped reduce pressure in energy markets.

Lower oil prices tend to soften inflation concerns because energy costs influence a wide range of consumer and business expenses. With crude retreating, investors appeared more confident that price pressures would remain contained, which in turn supported lower yields on the front end of the Treasury market.

The decline also aligned with indications that inflation expectations have slipped below the Federal Reserve's target. Even so, broader market gauges suggest investors still see long-term inflation as stable and well anchored rather than becoming unmoored.

Taken together, the moves point to a market that sees less immediate inflation risk and a steadier policy path from the Fed. For bond investors, the combination of softer oil and anchored inflation expectations helped reinforce demand for shorter-dated government debt.