Narrower spreads on new investments and rising prepayments could dampen earnings in the second quarter of 2012 for most residential mortgage real estate investment conduits (REITs) that invest in mortgage-backed securities, according to a new report from Keefe, Bruyette & Woods research. During the quarter, the Fannie Mae 30-year current coupon fell nearly 50 basis points from the prior quarter as a result of a 57 bps drop in the yield on a 10-year Treasury note. Dividends, a generally good indicator of profitability, either have been flat or down modestly, the KBW report noted. On a brighter note, while the government-sponsored enterprises’ monthly data showed...