A key long-term U.S. mortgage rate dipped this week, the second drop after a large increase two weeks ago.

A key long-term U.S. mortgage rate dipped this week, the second drop after a large increase two weeks ago.

Here's a look at rates for fixed and adjustable-rate mortgages this week and over the past year:

Current avg.Last week52-week high52-week low30-year fixed4.194.204.534.1015-year fixed3.363.363.563.205-year adjustable3.063.083.152.931-year adjustable2.422.432.642.35All values in percentage pointsSource: Freddie Mac Primary Mortgage Market Survey