U.S. Treasury yields climbed sharply on Wednesday despite softer-than-expected August PCE inflation, with the 30-year yield reaching 5.63%, its highest level since June 2002, and the 10-year yield reported at about 5.3%, near a 2002 high. A global government-bond selloff, persistent energy costs, heavy debt issuance, resilient economic data and expectations for further Federal Reserve rate increases kept pressure on long-duration bonds. Asset managers added more than 100,000 10-year Treasury futures short contracts in the week through Sept. 22, increasing the risk that weaker data or a dovish Fed signal could trigger short covering and sharply lower yields. The Treasury raised its bond-buyback ceiling to $6 billion for 10- to 20-year bonds in a liquidity-support operation.