Although primary market lenders will face fewer hurdles in originating refinance loans for underwater Fannie Mae and Freddie Mac borrowers, detailed guidelines released by the government-sponsored enterprises this week confirm that it will take several months before the expanded programs are fully implemented. And when they are, the revamped Home Affordable Refinance Program will generate up to one million new loans that otherwise wouldn’t have happened, according to estimates by Keefe, Bruyette & Woods. That’s just about what the market expected, and it will mean... (Includes one data chart)