By Min Zeng 
 

U.S. Treasury bond prices sank on Thursday, wrapping up the biggest two-day selloff in more than a year, as the Federal Reserve's stance of being patient in raising interest rates cheered up global stocks.

A round of upbeat global data also sapped demand for haven bonds. Retail sales in the U.K. rose last month at the fastest pace in 2014. A gauge of business confidence in Germany improved. The latest jobless claims in the U.S. dropped last week, a sign of the labor market gaining traction.

In late-afternoon trading, the yield on the benchmark 10-year note rose to 2.204% from 2.146% a day earlier.

The yield rose by 0.13 percentage point since the start of Wednesday, marking the biggest two-day increase since November 2013.

When bond yields rise, their prices fall.

The flight out of Treasury debt suggests investors' sentiment has improved over the past two days.

Investors had piled into Treasury bonds for safety earlier this week, sending benchmark bond yields to the lowest level in more than a year, as market turmoil in Russia and weak manufacturing releases out of China and Germany had heightened anxiety over the global economy.

"The fear trade has subsided," said James Combias, head of U.S. Treasury trading at Mizuho Securities USA Inc. in New York. "Given bond yields at these low levels, it is not unusual to see haven demand pull back as risky markets calm down."

U.S. stocks strengthened Thursday, extending Wednesday's gain. Equity markets in Japan and Europe also rose. Russia's ruble has rebounded from a record low against the dollar made on Tuesday.

The selling represents a minor setback for the bond market. The yield on the 10-year note had fallen to 2.07% on Tuesday, the lowest closing level since May 2013. The yield was 3% at the start of the year.

Faltering growth overseas, tumbling oil prices, geopolitical tensions between Russia and Ukraine, and market stress in some emerging-market countries had boosted demand for Treasury debt during the course of 2014.

U.S. government bonds offer the highest yield among the bond markets in the major developed countries, luring buyers seeking relative value among highly-liquid bonds. A strengthening dollar this year has boosted foreign investors' returns from U.S. financial assets.

Treasury securities overall have posted a total return, reflecting price appreciation and interest payments, of 5.07% this year through Wednesday, according to Barclays PLC.

Demand for haven bonds started to decline Wednesday as U.S. stocks rallied following the Fed's interest-rate statement at the conclusion of its two-day policy meeting.

The Fed said it would be patient in reversing its zero-interest-rate policy. Fed Chairwoman Janet Yellen said in a press conference Wednesday following the rate statement that she expects the U.S. economy to strengthen in the new year, shaking off concerns over weaker growth overseas and recent market stress in some emerging-market countries.

"Treasury yields were just far too low on the fear trade anyway, so they have a lot of catching up to do," which means higher yields, said David Keeble, global head of interest-rate strategy at Credit Agricole in New York.

Some traders said the bond market has also been under selling pressure as comments from Ms. Yellen raised some concerns that the Fed may raise interest rates sooner than many investors expect, even though the central bank stressed patience in the rate statement.

Ms. Yellen said Wednesday that the Fed won't raise interest rates for at least the "next couple of meetings."

Investors are concerned that a rate increase could come as soon as the April 2015 policy meeting. That will be sooner than the second half of 2015, which many investors currently expect. Ms. Yellen has long been a leading advocate of keeping interest rates near zero to support the economy.

"The bond market is starting to adjust a bit" to the prospect of higher interest rates from the Fed in 2015, said Thomas Roth, executive director in the U.S. government bond trading group at Mitsubishi UFJ Securities (USA) Inc. in New York.

 
COUPON  ISSUE       PRICE       CHANGE        YIELD      CHANGE 
1/2%    2-year      99 24/32    dn 2/32       0.633%     +2.0BP 
1%      3-year      99 24/32    dn 1/32       1.086%     +1.1BP 
1 1/2%  5-year      99 8/32     dn 6/32       1.658%     +4.1BP 
1 7/8%  7-year      99 6/32     dn 12/32      2.001%     +5.7BP 
2 1/4%  10-year   100 13/32     dn 17/32      2.204%     +5.6BP 
3%      30-year   103 22/32     dn 1 11/32    2.816%     +6.5BP 
2-10-Yr Yield Spread: +157.1BPS +153.7BPS 
 
Source: Tradeweb/WSJ Market Data Group 
 

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