Treasury yields surged to their highest in three weeks on Friday after data showed European banks are repaying more emergency loans than expected, suggesting the region is healing and reducing demand for safe-haven debt. The European Central Bank said that 278 banks will repay $183 billion in three-year loans next week, out of $1.34 trillion euros that the ECB lent in twin operations in December 2011 and February 2012. The news sent German