Yields at these levels look attractive to investors.
Investors feel there is no need to aggressively buy bonds now as yields may continue climbing amid signs of solid economic growth.
An increase in purchases by overseas investors is a reason for bonds to rise. It will assure investors that yields won't continue rising.
There is a solid demand for long-term bonds with a 20- to 30-year maturity. Twenty-year yields around 2.2 percent are attractive.
Ten-year yields have fallen to quite a low level as the concern over a U.S. economic slowdown has grown.