Mortgage rates reached their highest level in nearly a year as the Iran war continued to escalate, stoking fresh fears from investors about inflation and oil prices. Fifteen-year mortgage rates jumped to 5.96%, from 5.93%. Justin Sullivan via Getty ImagesThe 10-year Treasury yield, which mortgage rates closely track, has risen in recent days amid rising tensions between the US and Iran. Although mortgage rates are sitting at their highest level since last August, at least some homebuyers are moving forward. Mortgage applications for home purchases were up 6% through Friday from a week earlier, according to the Mortgage Bankers Association.