U.S. Treasury yields are falling after Chairman Ben Bernanke said the Federal Reserve will do more to help the economy if it doesn't improve.
Bernanke stopped short of committing the central bank to any specific move, but investors seemed cheered nonetheless. The yield on the 10-year Treasury note fell to 1.58 percent Friday from 1.63 percent late Thursday.
The price of the 10-year note, which moves in the opposite direction to the yield, rose 68.75 cents for every $100 invested.
The yield on 30-year bond fell to 2.71 percent from 2.74 percent. The price rose $1.22 for every $100 invested.
In his speech at the Fed's annual conference in Jackson Hole, Wyo., Bernanke said the Fed "should not rule out" new policies to help the economy.