Treasurys were higher on Tuesday after the government's auction of three-year notes as traders looked ahead to a potentially market-moving congressional testimony by Federal Reserve Chair Janet Yellen.
The Treasury Department auctioned $29 billion in three-year notes at a high yield of 0.928 percent. The bid-to-cover ratio, an indicator of demand, was 3.40, compared to a recent average of 3.32 percent.
Prices of 10-year notes were up 6/32 in New York, yielding 2.59 percent. On Friday, the issue yielded as little as 2.57 percent, a three-month trough.
U.S. 30-year bond yields stood at 3.38 percent, reflecting a price rise of 20/32. Shorter Treasury maturities were flat or little changed.
"We're having a little mini rally now but it's hard to see a narrative based on fundamentals when Yellen will be the topic of discussion for everyone," said Michael Cloherty, head of U.S. interest rate strategy at RBC Securities.