Agency single-family MBS issuance ended 2011 with a bang as the three agencies jostled for market share, a new Inside MBS & ABS analysis reveals. Ginnie Mae and Freddie Mac ended the year with nearly identical total issuance, with Freddie seeing a slightly larger decline from 2010 levels. Fannie Mae, however, recorded a much smaller drop in total production last year, boosting its share of the agency market. Freddie could not keep pace with Fannie’s surging MBS issuance volume during the fourth quarter. In December, Freddie accounted for just 22.7 percent of combined production by the two...