By Ben Eisen, MarketWatch

NEW YORK (MarketWatch) -- Treasury prices climbed Tuesday after a strong auction of 5-year notes, sending benchmark yields back toward their lowest in over a year.

The 10-year Treasury note (10_YEAR) yield, which falls as prices rise, was down 2.5 basis points on the day at 2.465%. In May, the benchmark yield touched its lowest point in over a year at 2.438%.

Tuesday's move comes ahead of a surge of U.S. economic news, including a second-quarter GDP report on Wednesday morning, a statement from the Federal Reserve's policy committee that afternoon, and a nonfarm payrolls report on Friday.

European bond yields also fell on Tuesday, with the 10-year German bund yield dropping 3 basis points to 1.120%, its lowest ever on a closing basis. The 10-year Spanish bond yield fell 2 basis points to 2.474%. It briefly dipped below comparable U.S. Treasurys on a nominal basis.

Treasurys got a boost after an auction of $35 billion in 5-year notes, which came in strong, despite investor nervousness about shorter-term debt. These are the stats from the auction:

* The notes sold at a yield of 1.720%.

* The ratio of bidders to the amount sold was 2.81 times, compared with 2.80 times in the last six sales.

* Direct bidders, which include domestic money managers, showed up in force, buying 25.9% of the sale, compared to 13.6% in recent sales. Indirect bidders, often a proxy for foreign demand, bought up 48.2% of the sale, versus the recent average of 49%. Combined, buyers took down a record amount of debt for an auction of 5-year note, according to Stone & McCarthy Research Associates.

Here's what moved the bond market on Tuesday:

* The deteriorating situation between Russia and Ukraine sent continued tremors across the bond market as the European Union agreed to tougher sanctions on Russia. The U.S.expanded sanctions as well late Tuesday.

* The Case-Shiller 20-city composite index showed decceleration in the rate of home-price growth. Steven Ricchiuto, chief economist at Mizuho Securities, wrote in a research note: "This downshift in prices reflects the fact that the housing market has lost its upside momentum despite the low level of yields."

* Consumer confidence data showed the highest reading since 2007, helping Treasurys cut gains.

* Shorter-term maturities in the U.S. Treasurys market posted narrower gains. Market participants have remained cautious on the so-called belly-of-the-curve, which could be sensitive to shifts in the monetary policy outlook, based on big data releases or the Fed statement this week. That has resulted in a narrowing of the differential between the 5-year note and 30-year bond. Read more about what it means.

The 5-year note (5_YEAR) yield was down 1.5 basis points at 1.688%. The 30-year bond (30_YEAR) yield fell 3.5 basis points to 3.226%. The spread between them was last at 1.54 percentage points, its smallest since the beginning of 2009 on a closing basis.

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