The average rate on a 30-year mortgage in the U.S. rose for the fifth straight week, returning to its highest level since early August.

The rate rose to 6.72% from 6.54% last week, mortgage buyer Freddie Mac said Thursday. That’s still down from a year ago, when the rate averaged 7.76%.

Borrowing costs on 15-year fixed-rate mortgages, popular with homeowners seeking to refinance their home loan to a lower rate, also increased this week. The average rate rose to 5.99% from 5.71% last week. A year ago, it averaged 7.03%, Freddie Mac said.

When mortgage rates increase they can add hundreds of dollars a month in costs for borrowers, reducing homebuyers’ purchasing power. — Associated Press