U.S. Treasurys ended a six-session rally on Monday, with prices surrendering early gains and turning down on profit-taking ahead of Friday's key U.S. unemployment report.
A credit downgrade of Japan had fueled early gains in Treasuries on Monday, threatening to extend the rally, which has been built on falling oil prices and concerns about global growth. Brent oil prices sank to five-year lows before recovering to gain 3.3 percent.
Traders attributed the move to profit-taking, after several days of gains and a strong November, ahead of market-moving data including U.S. auto sales, service-sector sentiment and Friday's November jobs report.
Prices of 30-year debt swung widely, with yields ranging from a low of 2.876 percent at the start of U.S. trading to a high of 2.95 percent.
The long bond last yielded 2.95 percent, reflecting a price decline of 1 3/32, according to Reuters data.