By Min Zeng

Treasury bonds eked out slim price gains on Wednesday as investors remain cautious over geopolitical risks.

The benchmark 10-year note rose for a third straight session with its yield near the lowest point of the year.

In late afternoon trading, the benchmark 10-year note was 1/32 higher, yielding 2.464%, according to Tradeweb. Bond yields fall as their prices rise.

The 10-year note's yield dipped to 2.4% during the May 29 session, the lowest intraday level since June 2013. The yield was 3% at the start of January.

Investors are keeping an eye on geopolitical tensions following last week's downing of a Malaysia Airlines jetliner in Ukraine and Israel's ground offensive in Gaza. For the moment, investors and analysts believe the fallouts will be contained, but they caution that a wider contagion could undercut the still uneven pace of the global economy.

Larry Milstein, head of government and agency trading at R.W. Pressprich & Co. in New York, said the 10-year note's yield could retest 2.4% or fall below that level if flight to safety demand accelerates. But he said bond prices could fall if "things cool down in the Middle East and Ukraine."

Meanwhile, the Bank of England on Wednesday suggested in the minutes of its recent policy meeting that it is in no rush to raise interest rates. Officials fret that weak wage growth could leave consumers vulnerable if borrowing costs rise too soon.

The latest signal that major central banks continue to take their time in tightening monetary policy sent government bond yields in both the U.K. and the U.S. lower. The 10-year U.K. government bond's yield fell to 2.557%.

In the U.S., Federal Reserve Chairwoman Janet Yellen said last month the central bank may need to keep interest rates low for a considerable period to support the economy.

Wednesday, the International Monetary Fund cuts its forecast for the U.S. economic growth this year, citing the sharp contraction during the first quarter. The IMF expects the U.S. economy to grow at 1.7% for 2014, down from 2% previously expected.

The Fed has held its policy rate, the fed-funds rate, near zero since December 2008. Most economists expect the first rate increase in the middle of 2015.

A report Tuesday suggested inflation in the U.S. isn't a big threat to bond investors. The U.S. consumer-price index excluding food and energy posted a 0.1% gain last month, half of what economists had expected. The index rose 1.9% in June from a year earlier, down from 2%--the Fed's inflation target--in May.

Inflation chips away bonds' value over time.

Lower bond yields in Germany and Japan have boosted the allure of Treasury debt, one of the main factors sending Treasury yields lower this year.

Wednesday, the 10-year German government bond yielded 1.147%. The 10-year Japanese government bond yield was 0.53%.

This year's decline in Treasury yields has confounded traders and market pundits calling for bond yields to rise this year.

Despite the setback, strategists at Goldman Sachs Group Inc., J.P. Morgan Chase & Co. and Morgan Stanley expect the 10-year yield to rise to 3% by the end of the year. The key argument to send yields higher is that the U.S. economy is gaining momentum while inflation pressure continues to tick higher, factors that could push the Fed to raise official interest rates earlier than many investors expect.

 
COUPON  ISSUE   PRICE      CHANGE   YIELD     CHANGE 
1/2%    2-year 100 1/2     flat     0.476%     flat 
7/8%    3-year 99 25/32    up 1/32  0.952%     -1.1BP 
1 5/8%  5-year 99 28/32    up 1/32  1.650%     -0.8BP 
2 1/8%  7-year 100 2/32    flat     2.115%     flat 
2 1/2% 10-year 100 10/23   up 1/32  2.464%     -0.8BP 
3 3/8% 30-year 102 6/32    dn 4/32  3.260%     +0.8BP 
2-10-Yr Yield Spread: +198.8BPS Vs +198.6BPS 
 
Source: Tradeweb 
 

Write to Min Zeng at min.zeng@wsj.com