Fixed mortgage rates rose for the fourth straight week as Treasurys backed up further as better-than-anticipated economic news led to reduced expectations of quantitative easing while headlines out of Europe have been quiet.

For the week ending Aug. 23, Freddie Mac reported 30-year fixed mortgage rates averaged 3.66% from 3.62% last week with rates at their highest level since the last half of June when they were at 3.66%.

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