Global bond selloff rolls on, US 30-year yield at highest since 2004
By Amanda Cooper, Sophie Kiderlin and Gertrude Chavez-Dreyfuss LONDON/NEW YORK, Sept 24 (Reuters) - US long-dated Treasury yields rose to their highest in more than 20 years on Thursday, extending a global selloff that has accelerated on worries that high energy costs, resilient economic growth and