房地美：美国上周30年期按揭贷款/抵押贷款利率6.81%，创5月中旬以来新低，前值6.84%。

Group 1 - The core point of the article is that the average rate for a 30-year fixed mortgage in the U.S. has decreased to 6.81%, marking the lowest level since mid-May, down from the previous rate of 6.84% [1] Group 2 - The decline in mortgage rates may influence housing market dynamics, potentially making home buying more attractive to consumers [1]