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In the first week of August, the average 30-year mortgage rate stayed mostly flat at 6.63% APR. This is three basis points lower than a week ago.

A basis point is one one-hundredth of a percentage point, and we calculate our weekly average using daily APRs provided by Zillow over the past five business days.

Originally published on nerdwallet.com, part of the BLOX Digital Content Exchange.