Average long-term US mortgage rate rises to 6.57% this week, highest level since mid March

The average long-term U.S. mortgage rate rose this week to its highest level since mid March, driving up borrowing costs for prospective homebuyers facing a housing market that’s constrained by a dearth of homes for sale. Mortgage buyer Freddie Mac said Thursday that the average rate on the benchmark 30-year home loan rose to 6.57% from 6.39% last week. The average rate a year ago was 5.10%. High rates can add hundreds of dollars a month in costs for homebuyers, limiting how much buyers can afford in a market that remains unaffordable to many Americans after years of soaring home prices and limited housing inventory.