Freddie Mac has continued to tweak its underwriting procedures and product line-up in order to bolster its performance in the affordable-housing market and improve its service to lender customers. In a recent industry letter, the GSE informed lenders that 5/1 adjustable-rate mortgages would be eligible for purchase under Freddie’s new Home Possible program as long as the loans are secured by 1- or 2-unit primary residences. Additionally, permitted secondary financing has been expanded to include…