The yield on the benchmark 10-year Treasury note hit the key psychological level of 3 percent Tuesday for the first time since January 2014 on Tuesday.
The yield inched past 3 percent shortly after the open of stock trading on Tuesday.
Global investors have been fixated on the 10-year note yield in recent days as it climbed upward, concerned that the 3 percent level could trigger a reaction from financial markets around the world.
The yield, a barometer for mortgage rates and other financial instruments, has jumped in April on signs of nascent inflation and as the Federal Reserve stood by its plan to gradually tighten monetary policy. A move in the yield above 2.9 percent in February triggered a correction for U.S. stocks.