U.S. mortgage interest rates continued their upward movement last week, as the average rate on the 30-year fixed mortgage rose for the fourth straight week, moving up to 3.66% from the previous 3.62%. Four weeks ago, the aforementioned loan package reached the lowest ever rate in the history of long-term mortgages, in the form of 3.49%.

As far as the 15-year FRM is concerned, which is especially popular among home refinancers, the national average rate inched up to 2.89%, a slight increase from the previous 2.88% rate, it held a week earlier.

Low mortgage rates have been helping the U.S. housing market’s recovery. Previously occupied home sales ticked up 2.3% in July to a seasonally adjusted 4.47 million, the National Association of Realtors said last week. Sales are up more than 10 percent over the past 12 months circle, signaling a positive change.

According to the National Association of Realtors’ latest figures, new home sales climbed 3.6% in July, matching a two-year high. Although, all these data point to an improvement in the housing market, the pace of home sales are still below healthy levels.

Mortgage refinance rates at Bank of America (NYSE:BAC) start the new week at lower levels, which should be good news for those potential borrowers who qualify for rock bottom rates. The asking rate for the benchmark 30-year fixed mortgage is now 3.625% and it’s accompanied by an annual percentage rate of 3.773%. The shorter, 15-year FRM now demands 2.875% plus an APR sum of 3.136%.

Moving to more flexible, adjustable rate mortgage options, Bank of America offers the 7/1 ARM this Monday at a rate of 2.625% which bears an APR figure of 3.183%. The 5/1 ARM version is up for grabs at a rate of 2.375% and features an APR variable of 3.162%.

Others, who prefer to refinance their existing loans at Capital One (NYSE:COF), will see some decent rates being attached to the various mortgage packages. Currently, the opening rate on the 30-year fixed refinance loan is 3.750% and it has a competitive APR in the form of 3.852%. Those borrowers, who are considering to take on the 15-year fixed deal, can expect a rate of 3.000% and an APR of 3.152% as of Monday.

Capital One offers ARM packages as well, with the 5/1 adjustable rate loan coming out at 2.500% and bears an APR variable of 2.576%.

Heading over to Chase (NYSE:JPM), borrowers will see the standard 30-year fixed loan being advertised at a rate of 3.875% with an APR amounting to 3.947%. Those who believe the 15-year FRM fits the bill better, will encounter a starting rate in the form of 3.000% and an annual percentage rate of 3.107%.

Most adjustable rate mortgages retained their strength at Chase coming to the new week, with the 7/1 ARM carrying a rate of 2.625% and an APR of 3.054%. As for the 5/1 ARM, would-be borrowers can get it locked in today for as low as 2.375% plus an APR figure of 3.053%.