Mortgage rates continue to fall even lower. Freddie Mac reported its recent weekly survey shows the average 30-year fixed-rate mortgage fell to 3.91%, the lowest point in four decades and the sixth time a new low has been reached during 2011.

Adjustable-rate mortgages continue to adjust downward, as well. Freddie Mac said the five-year ARM average has declined to a new record low of 2.85%, while the one-year ARM has declined to 2.77%, also a new low. The 15-year fixed remained unchanged from one week earlier at 3.21%.

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