Professional money managers see the U.S. economy on a sounder footing over the next 12 months, with expectations of little or no gain among mortgage-related assets over the next year, according to a new Fitch Ratings survey of fixed-income investors. Opinions about the credit conditions of mortgage investment vehicles in the near term mostly focused on modest, rather than severe, deterioration. In this segment, investors were mostly optimistic about prime mortgage-backed bonds. Overall, the survey found...