The average rate on a 30-year fixed mortgage edged up by 4 basis points in the second week of June to 6.52%, according to data from Freddie Mac. That level was just 1 basis point below the nine-month high reached two weeks earlier, reflecting the recent rise in long-term Treasury yields. A protracted conflict between the US and Iran has continued to disrupt energy exports from the region, pushing US inflation higher and prompting rate traders to increasingly price in a Federal Reserve interest rate hike later this year.