MBS analysts hold differing expectations as to what the potential replacement of the “temporary” head of the Federal Housing Finance Agency could mean to Fannie Mae, Freddie Mac and the mortgage securities sector. Recently reported Obama administration backchannel chatter suggests that the White House is actively seeking potential candidates to replace FHFA Acting Director Edward DeMarco, who has been the de facto agency chief since the departure of James Lockhart in September 2009. A report last week by Credit Suisse speculated...