By Lawrence Delevingne Oct 26 (Reuters) - Shares around the world fell and U.S. Treasury yields retreated on Thursday as investors digested mixed U.S. economic and corporate signals. The U.S. economy grew faster than expected in the third quarter, again defying dire warnings of a recession, buoyed by robust consumer spending amid a resilient labor market. US/US10YT=RR Quincy Krosby, chief global strategist at LPL Financial in Charlotte, said U.S. economic growth has prompted market concerns that the Fed may need to increase interest rates again before the end of the year to quell inflation.