U.S. Treasury yields fell on Tuesday as investors looked toward a speech by Federal Reserve Chair Jerome Powell, which could offer more insights about future monetary policy decisions.

The 10-year Treasury

fell more than 3 basis points to a one-month low of 4.017%, while the 2-year Treasury yield was almost 5 basis points lower at 3.478%. The longer maturity 30-year Treasury yield fell over one basis point to 4.615%.

One basis point is equal to 0.01% and yields and prices move in opposite directions.

The Fed’s Powell is scheduled to deliver remarks at the NABE annual meeting in Philadelphia later in the day.