German two-year note yields were two basis points from a three-month high before the nation sells as much as 5 billion euros ($6.6 billion) of the securities.
Ten-year bonds slipped after Greek Prime Minister Lucas Papademos won parliamentary approval for a new 130 billion-euro international bailout. Portugal is scheduled to auction as much as 2 billion euros of treasury bills maturing in 119 and 364 days, having added one-year bills to the program due to demand from investors. Germany will also sell 2 billion euros of inflation-linked bonds due in April 2023.
The German two-year yield rose less than one basis point to 0.34 percent at 7:26 a.m. London time. Yields reached 0.36 percent on March 16, the highest since Dec. 7. The 0.25 percent security due March 2014, was at 99.83 cents on the euro. The 10-year yield rose one basis point to 2.05 percent.
German bonds made a 1.1 percent loss this year after returning 9.7 percent in 2011, according to indexes compiled by Bloomberg and the European Federation of Financial Analysts Societies. Portuguese debt has climbed 5.7 percent since Dec. 31, the data show.