From RealTrends.com: Lenders in the LendingTree Network saw rates on 30- and 15-year, fixed-rate mortgages plunge to a six-month low this past week, LendingTree said in a report Wednesday. The network of mortgage lenders said the average 30-year, FRM at LendingTree branches fell to 4.71%, while the 15-year FRM hit 3.99% for the week ending June 7.  Rates on 5/1 adjustable-rate mortgages also fell to 3.27%. Analysts with LendingTree fear Dodd-Frank rules, including the qualified residential mortgage exemption that’s tied to risk retention, could depress housing prices and mortgage rates further.