Five mortgage industry veterans – including two who worked in the Obama White House – this week floated a new plan aimed at preserving the government guaranty on conventional MBS and ending, once and for all, the uncertainly plaguing the secondary market. In a new white paper entitled “A More Promising Road to GSE Reform,” the authors aim to preserve the government-backed MBS market while merging Fannie Mae and Freddie Mac into a new institution called the National Mortgage Reinsurance Corp. But the proposal might be...