Here's a look at the state of mortgage rates from Bankrate.com's weekly national survey of large banks and thrifts conducted Feb. 3, 2010.

Mortgages

Mortgage rates rose slightly after falling for four straight weeks.

The average 30-year fixed-rate mortgage rose 2 basis points, to 5.15 percent. A basis point is one-hundredth of a percentage point.

Meanwhile, this week's average 15-year fixed-rate -- a popular option for refinancing -- edged up 1 basis point, to 4.55 percent.

The average jumbo 30-year fixed also increased 1 basis point, to 6 percent.

Adjustable-rate mortgages split this week. The one-year adjustable-rate mortgage remained unchanged at 4.92 percent. Meanwhile, the popular 5/1 ARM rose 2 basis points, to 4.56 percent.

Mortgage applications soared a seasonally adjusted 21 percent when compared to a week earlier, according to the Mortgage Bankers Association. For the week ending Feb. 3, applications for new purchase rose 17.5 percent, while refinancing activity jumped 26.3 percent.

In other mortgage-related news, pending home sales increased by 1 percent in December when compared to a month earlier, according to the National Association of Realtors. Sales also were up 10.9 percent year over year.

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-- Chris Kissell