Average long-term U.S. mortgage rates rose this week for the first time in two months as global economic anxiety and market turbulence eased. Mortgage buyer Freddie Mac said Thursday the average rate on a 30-year, fixed-rate mortgage increased to 3.64 percent from 3.62 percent last week. The benchmark rate remains below the 3.75 percent level it marked a year ago. The average rate on 15-year fixed-rate mortgages edged up to 2.94 percent from 2.93 percent last week. Read more.