Ten-year Treasuries dipped 1/32 in price to yield 3.316 percent, in holiday-thinned Asian trade, with Japanese investors away for a national holiday. The 10-year yield was little changed on the day and hovered near a one-month low just below 3.30 percent hit on Thursday.
The 10-year yield has dropped 15.4 basis points in April, and is on track for its biggest monthly drop since August 2010.
The 10-year yield has declined over the past few weeks on the back of growing market expectations that slowing economic growth and pressure to cut government spending will require the Federal Reserve to keep rates low for longer than some had expected.
The Fed's policy decision and remarks by Fed Chairman Ben Bernanke this week reinforced such market expectations. The Fed said on Wednesday that it would end its bond-buying programme in June as planned and appeared in no rush to tighten monetary policy further.
Most US primary dealers expect the Fed to hold interest rates at the current level near zero through the end of the year.