Spanish 10-year bonds advanced as the nation prepared to sell as much as 2 billion euros ($2.5 billion) of notes maturing in 2014, 2015 and 2017.
The 10-year rate fell 11 basis points to 6.64 percent at 8:29 a.m. London time.
Similar-maturity Italian debt also rose, with the yield dropping six basis points to 5.71 percent.
Borrowing costs for Spanish one-year bills surged to more than 5 percent at a sale two days ago.
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