Treasury prices edged higher in quiet trading Friday after the Federal Reserve bought long-dated debt.
The yield on the 30-year bond fell to 3.11 percent from 3.13 percent as its price rose 53.1 cents per $100.
The Federal Reserve bought $1.9 billion in bonds maturing between Feb. 15, 2036 and Feb. 15, 2042. The purchases were part of the Fed's bond-buying program aimed at supporting the economy by keeping interest rates low.
In other trading, the yield on the benchmark 10-year Treasury note was 1.98 percent in late trading versus 1.99 percent late Thursday. Its price rose 15.6 cents per $100 invested. The yield on the two-year note was flat at 0.31 percent.
The three-month T-bill paid a yield of 0.09 percent.