The yield on benchmark 10-year Treasury notes—used to calculate mortgage rates and other consumer loans—briefly turned positive on Friday after touching a session-high of 2.119 percent. It was last down at 2.1185 percent.
U.S. 30-year Treasury bond yields moved up to 2.7008 percent. Yields move inversely to prices.
U.S. sovereign bond yields were mostly down on Friday as U.S. stocks fell nearly 1 percent. U.S. Treasury prices also rose after the March U.S. consumer sentiment index missed analysts expectations.
Consumer sentiment hit 91.2 on March, missing the estimated 95.5. The index read 93.6 for the previous month.
Earlier, the Labor Department said on Friday its producer price index for final demand fell 0.5 percent after dropping 0.8 percent in January. It was the fourth straight monthly decline in the PPI, leading to session-low yields.
On Thursday, Treasury prices rallied after retails sales for February missed expectations.
It's been an interesting week in the bond markets, following the launch of a government bond-buying program by the European Central Bank (ECB) on Monday. Yields on European sovereign bonds touched record lows as a result. On Friday, though, the yield on 10-year German bunds moved up to 0.2180 percent.
U.S. five-year Treasury note yields were down at 1.5657 percent, while seven-year note yields were down at 1.8969.
—Reuters contributed reporting.