The content originally appeared on: CNN Mortgage rates jumped higher this week as investors tried to make sense of data that gave mixed signals about the health of the US economy. The 30-year fixed-rate mortgage averaged 5.55% in the week ending August 25, up from 5.13% the week before, according to Freddie Mac. That is significantly higher than this time last year when it was 2.87%. After starting the year at 3.22%, mortgage rates rose sharply during the first half […]