Average U.S. rates on fixed mortgages stayed close to record lows this week, a trend that is boosting home sales.

Here's a look at rates for fixed and adjustable mortgages over the past 52 weeks:

Current avg. Last week 52-week high 52-week low
30-year fixed 3.32 3.31 4.08 3.31
15-year fixed 2.64 2.63 3.30 2.63
5-year adjustable 2.72 2.74 2.96 2.71
1-year adjustable 2.56 2.56 2.84 2.55
All values in percentage points
Source: Freddie Mac Primary Mortgage Market Survey