The average rate on a 30-year mortgage in the U.S. rose for the sixth straight week, returning to its highest level since early July. The rate ticked up to 6.79% from 6.72% last week, mortgage buyer Freddie Mac said Thursday. That’s still down from a year ago, when the rate averaged 7.5%. Borrowing costs on 15-year fixed-rate mortgages, popular with homeowners seeking to refinance their home loan to a lower rate, also edged higher this week. The average rate rose to 6% from 5.99% last week. A year ago, it averaged 6.81%, Freddie Mac said. When mortgage rates increase they can add hundreds of dollars a month in costs for borrowers, reducing homebuyers’ purchasing power at a time when home prices remain near all-time highs, even though the housing market remains in a sales slump going back to 2022. Mortgage rates are influenced by several factors, including the yield on U.S. 10-year Treasury bonds, which lenders use as a guide to price home loans. Bond yields have been rising following encouraging reports on inflation and the economy. Read the full story.