May 27 (Reuters) – The rate on the most popular U.S. residential real estate ?loan hit a nine-month high last week in another blow to home-ownership affordability, as the Iran war kept oil prices elevated, fueling ?inflation concerns and pushing up benchmark U.S. Treasury yields.

The average 30-year fixed-rate mortgage rose 9 basis points to 6.65% in the week ended May 22, the Mortgage Bankers Association said on Wednesday. It was last higher in August 2025, before the Federal Reserve began a series of interest rate cuts to head off further labor market weakening that ?for a time helped bring down 30-year mortgage rates to around 6% before President Donald Trump and Israel launched attacks on Iran in ?late February.