U.S. government bond yields inched off session highs on Thursday as the U.S. government's auction of seven-year Treasury notes met solid demand.
The Treasury Department auctioned $29 billion in seven-year notes at a high yield of 2.153 percent. The bid-to-cover ratio, an indicator of demand, was 2.38, below the 2.46 recent average.
Seven-year note yields were trading at 2.12 percent, compared to 2.15 percent before the announcement. Benchmark 10-year note yields were at 2.39 percent, versus 2.42 percent earlier.
Indirect bidders, which include major central banks, were awarded 56.5 percent, the biggest slice since December 2010. Direct bidders, which includes domestic money managers, brought 11.9 percent, versus a recent average of 13 percent.
Prices slipped tumbled earlier on renewed optimism that Greece would avert a debt default after the country's international creditors presented a final cash-for-reform proposal to euro zone finance ministers.
Euro zone finance ministers will work on a financing-for-reforms deal with Greece on the basis of a proposal from the creditor institutions as negotiations with Athens have produced no agreement, officials said.
"The main thing is Greece, and the market is still going to move to some degree, up and down, based on the headlines," said Lou Brien, market strategist at DRW Trading in Chicago.
Analysts said that while the slight weakness in Treasurys prices was due to optimism over a Greek debt deal, traders' uncertainty over the outcome of negotiations capped losses and prices were likely to remain volatile in response to developments out of Greece.
Treasurys
Thursday's price losses curtailed a rally in Treasurys prices on Wednesday after a roadblock in negotiations crimped demand for safe-haven U.S. government bonds. Most yields remained within recent ranges on Thursday, while five-year note yields bucked the trend and rose to a more than one-week high of 1.73 percent.
Traders' preoccupation with Greece overshadowed data showing U.S. consumer spending grew its most in nearly six years in May on strong demand for automobiles and other big-ticket items.
Read MoreWith Greece as backdrop, new data get a look
U.S. economic data has been closely watched recently given its potential to influence the Federal Reserve's timeline for hiking interest rates for the first time in about ten years. A Fed rate hike would likely hurt bond prices.
"As much as we are data-dependent for the Fed, I don't think it had much of an impact on the market," said Justin Lederer, Treasury strategist at Cantor Fitzgerald in New York, in reference to the latest U.S. data. "The market is just focusing on Greece."
U.S. 30-year Treasurys were last down 13/32 in price to yield 3.17 percent, from a yield of 3.15 percent late Wednesday.
yields were last at 1.72 percent, from a yield of 1.68 percent late Wednesday.