NAR's oposition falls primarily in two areas: The PATH Act does not include an explicit federal guaranty and the bill dramatically restructures the FHA.
In general, mortgage-related earnings were strong at the nation's banks in the second quarter, but clearly earnings "leakage" is underway. And yes, gain-on-sale is starting to slip.
FHFA sued UBS in 2011 over $4.5 billion in RMBS securities that the bank sponsored and $1.8 billion in third party RMBS sold to Fannie Mae and Freddie Mac.