The 30-year fixed-rate mortgage averaged 5.51% in the week ending July 14, up from 5.3% the week before, according to Freddie Mac. That is significantly higher than this time last year when it was 2.88%. Rates rose sharply at the start of the year, hitting a high of 5.81% in mid-June. But since then, economic concerns have pushed them lower, with rates last week notching the biggest one-week dip since 2008. * Mortgage rates continue to be volatile as the US economy slows and the Federal Reser...