In the tumultuous days following Standard & Poor's debt downgrades, rates on 30-year fixed mortgages fell to 4.32%, down from 4.39% last week and closed in on a record low of 4.17% set last November, according to Freddie Mac's Primary Mortgage Market Survey.

http://money.cnn.com/2011/08/11/real_estate/mortgage_rates_record/index.htm