Freddie: 30-Year Rates Stay Below 4%

Average fixed mortgage rates mostly stayed  quiet this week, in front of the Federal Reserve's vote on interest-rate hike for the first time in more than nine years, Freddie Mac reports in its weekly mortgage market survey.

"The Treasury market sector was generally tranquil this week, and therefore the 30-year home loan rate scarcely moved," says Sean Becketti, Freddie Mac's boss financial expert. "Low mortgage rates help to bolster housing markets, which keep on bringing uplifting news."

The Federal Reserve voted Thursday to not raise rates yet,  but Becketti says that even when the Fed does decide to raise short-term interest rates, "we don't expect a significant impact on the housing market. We're still on track for the best year of home sales since 2007 … While our outlook incorporates a moderate increase in mortgage rates over the next 18 months, rates are likely to remain low by historical standards and should not be a determining factor for most Americans looking to purchase a home."

Freddie Mac reports the following national averages with mortgage rates for the week ending Sept. 17: 

•30-year mortgage rates: average 3.91 percent, with a average 0.6 point, raising from last week's 3.90 average. A year back, 30-year rates average 4.23 percent.

•15-year mortgage rates: average 3.11 percent, with a average 0.6 point, crawling up somewhat from a week ago's 3.10 percent average. A year ago right now, 15-year rates average 3.37 percent.

•5-year  hybrid adjustable-rate mortgages:  average2.92 percent, with a average 0.5 point, raising from last week's 2.91 percent averge. A year back, 5-year ARMs average 3.06 percent.

•1-year ARMs: average 2.56 percent, with a average 0.2 point, dropping from last week's 2.63 percent normal. A year back, 1-year ARMs average 2.4