Spanish 10-year bonds declined, pushing the extra yield investors demand to hold the securities instead of similar-maturity German bunds to more than 500 basis points.

The spread increased 19 basis points to 500 basis points, or 5 percentage points, as of 9:37 a.m. London time, the widest since Aug. 17. The Spanish 10-year yield was 13 basis points higher at 6.41 percent.

To contact the reporter on this story: David Goodman in London at dgoodman28@bloomberg.net

To contact the editor responsible for this story: Paul Dobson at pdobson2@bloomberg.net