By Ben Eisen, MarketWatch

NEW YORK (MarketWatch) -- Treasury prices climbed Wednesday after a report showed weak growth in new home sales and an auction of 5-year notes saw tepid demand.

The 10-year note (10_YEAR) yield, which falls as prices rise, was down 4 basis points on the day at 2.688%. The 30-year bond (30_YEAR) yield dropped 3.5 basis points to 3.469% and the 5-year note (5_YEAR) yield fell 3 basis points to 1.714%.

A Commerce Department report showed a 14.5% plunge in sales of new single-family homes in March. The seasonally adjusted annual rate of 384,000 sales last month was the lowest since last July, missing economist expectations of a 450,000 reading.

"That fall is in contrast to some of the data we have gotten from other parts of the economy in the last couple of weeks, which suggested the economy had a significant rebound," said Jake Lowery, global rates portfolio manager at ING U.S. Investment Management.

Markit's flash PMI index for the U.S. also dropped slightly to 55.4 in April from 55.5 in March. Readings over 50 indicate growth, data showed.

The Treasury market has been looking for confirmation that economic data will rebound as the weather warms after a cold winter in much of the U.S., which was blamed for a slowdown in growth in the first few months of the year. The Federal Reserve says the trajectory of its key lending rate, now anchored near zero, depends on the pace of economic improvement.

The Treasury Department offered $35 billion in 5-year notes on Wednesday, which auctioned at a yield of 1.732%, slightly higher than where the broader market was trading at the time. The sale is the second in a trio of auctions this week, following a soft 2-year note auction on Tuesday. Intermediate sector yields, which are sensitive to speculation about when the Fed will hike its key lending rate, have been hard hit in recent months.

Bidders offered to buy 2.79 times the amount of debt for sale, compared with an average of 2.71 times during the past six sales. Non-dealers took down a sizeable portion of the debt. Direct bidders, which often includes domestic money managers, bought 18.6% of the sale, versus 12.9% in recent auctions. Indirect bidders, a group that often serves as a proxy for foreign central banks, took down 44.9%, compared with a recent average of 44.5%.

"The buyside takedown figures were decent, but the auction still tailed 0.6 basis points at 1.732%," said John Canavan, bond market analyst at Stone & McCarthy Research Associates, in a note.

The market was also bolstered earlier Wednesday by rising tensions in Ukraine. Kiev accused a Russian group of torturing and killing two people, and heard calls to start a military crackdown on activists. Meanwhile, the American sent troops for maneuvers in Eastern Europe amid a visit to Ukraine by U.S. Vice President Joseph Biden.

William O'Donnell, head Treasury strategist at RBS, wrote in a note to clients: "Ukraine tensions have resurfaced after Ukraine's government said that the 'Easter truce is over' with the U.S. moving troops into Eastern Europe."

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