The prospects of Fannie Mae growing its MBS portfolio over the next eight months grew dimmer this week as the government-sponsored enterprise announced that it was delaying the release of its third-quarter numbers and could take a $9 billion hit to earnings due to alleged accounting errors. The problems stem from a forensic probe of the GSE’s accounting policies conducted by the Office of Federal Housing Enterprise Oversight. OFHEO officials claim that Fannie misapplied accounting