Freddie Mac released its weekly survey of mortgage interest rates Thursday, which showed that the 30-year rate edged up 1 basis point while the 15-year rate dropped 1 basis point.

The GSE’s measurements for adjustable-rate mortgages (ARMs) – which have been gaining popularity among some borrowers – mirrored the same, with rates on the 5-year ARM slipping and the 1-year ARM rising slightly.

Freddie Mac described rates as “changing little despite recent inflation reports. The GSE’s weekly survey is based on data collected from about 125 lenders across the country.

After declining for eight weeks, the 30-year fixed-rate mortgage hit 4.50 percent (0.7 point) for the week ending June 16, up from 4.49 percent last week but still well below the 4.75 percent average seen this time last year.

The 15-year fixed-rate mortgage came in at 3.67 percent (0.7 point) this week. It averaged 3.68 percent last week and 4.20 percent a year ago.

The intro rates on 5-year ARMs are not averaging 3.27 percent (0.6 point), down from 3.28 percent last week and 3.89 percent 12 months ago.

The 1-year ARM averaged 2.97 percent this week (0.5 point), compared to 2.95 percent last week and 3.82 percent at this time last year.

“Mortgage rates were little changed this week as financial market participants shrugged off the recent inflation reports,” said Frank Nothaft, Freddie’s chief economist.

Nothaft added that household mortgage balances fell by more than $930 billion between the peak set at the end of March 2008 and March of this year, citing data from the Federal Reserve.

“Much of the run down in home mortgage debt so far has been through second mortgages,” according to Nothaft. He says seconds accounted for $820 billion of the decline over the last three years.