Treasury debt prices rose on Thursday after two days of losses as softer-than expected U.S. economic data rekindled the view that the Federal Reserve could pause in reducing its asset purchases.
Earlier, the Treasury Department auctioned $16 billion in 30-year bonds at a high yield of 3.690 percent.
The bid-to-cover ratio, an indicator of demand, was 2.27.
Yields on U.S. 10-year notes and 30-year bonds fell to session lows after U.S. jobless claims and retail sales data came in weaker than market expectations.
U.S. retail sales fell unexpectedly in January by 0.4 percent, and another gauge of consumer spending also slipped. U.S. initial jobless claim, meanwhile, rose to a seasonally adjusted 339,000.
"Essentially, it's a story of renewed concern that the recovery in the U.S. may be headed for a speed bump which may be more than weather-related," said Millan Mulraine, deputy head of research and strategy at TD Securities in New York.