The Federal Reserve’s effort to normalize its balance sheet later this year would cause no significant falloff in the agency mortgage-backed securities market over the next six to 12 months, according to global investment firm Loomis Sayles. In an analysis, the firm concluded that agency MBS remain attractive for now with modest excess returns for agency MBS versus Treasurys. “We favor a modest overweight agency MBS stance versus Treasurys for the remainder of 2017 and ...