房地美：美国上周30年期按揭贷款/抵押贷款利率6.76%，前值6.81%。

Group 1 - The core point of the article is that the average rate for a 30-year fixed mortgage in the United States decreased to 6.76% from the previous value of 6.81% [1] Group 2 - The current mortgage rate reflects a slight decline, indicating potential changes in the housing market dynamics [1] - The previous week's rate was 6.81%, showing a decrease of 0.05 percentage points [1]