U.S. Treasury debt yields rose on Tuesday as traders sold some bond holdings in advance of a combined $40 billion in longer-dated supply, which some traders worry might not lure strong demand due to their low yields.
Wednesday's auction of $24 billion in 10-year notes and Thursday's $16 billion sale of 30-year securities follow solid results at the $27 billion three-year note auction.
"Heading into tomorrow and Thursday, this is the time for a set-up for longer-dated supply," said Stanley Sun, interest rate strategist at Nomura Securities International in New York.
In the "when-issued" market, the upcoming 10-year note issue due August 2024 was quoted to sell at a yield of 2.460 percent , which would be the lowest since June 2013.
Earlier, the three-year note sale fetched a yield of 0.924 percent, which was the lowest in four months.
The selling pressure from this week's bond supply has been offset by a steady bid for safe-haven Treasurys on worries about conflicts in Iraq, eastern Ukraine and Gaza. Benchmark 10-year yields have lingered not far from last week's 14-month low of 2.349 percent.