NEW YORK (CNNMoney.com) -- Mortgage rates continued to decline this week, plunging to the lowest level in decades, according to surveys from Freddie Mac and Bankrate.
Freddie Mac's weekly report said the 30-year fixed rate slipped to 4.44% for the week ended Thursday, the lowest since the government-backed lender began tracking the rate in 1971. Last week's rates stood at 4.49%, and a year ago it was at 5.29%.
The 15-year fixed rate fell to 3.92% this week, the lowest since Freddie Mac began tracking it 1991, down from 3.95% last week and from 4.68% a year ago.
Adjustable-rate mortgages also declined, with the 5-year rate falling to 3.56% this week, the lowest since 2005 when the lender began tracking it.
Mortgage tracker Bankrate.com, which surveys large lenders across the country, said the average 30-year fixed loan sank to a record low for the fourth consecutive week, falling to 4.57% from 4.66% the previous week.
The 15-year fixed rate, which is a popular option for refinancing, also fell to the lowest level in the history of Bankrate's 25-year old survey, dipping to 4.06%, from 4.11% the week before.
While the 1-year adjustable-rate mortgage held steady at 4.8% for a fourth week, the 5-year adjustable rate mortgage dropped to a record low of 3.92% from 3.95% the previous week.
"Low rates are helping to heal many battered local housing markets by increasing home-purchase activity, said Frank Nothaft, chief economist at Freddie Mac.
Mortgage rate applications inched up a modest 0.6% during the week, according to the Mortgage Bankers Association. Applications for purchase rose 0.3% while refinance applications increased 0.6%. 
| Overnight Avg Rate | Latest | Change | Last Week |
|---|---|---|---|
| 30 yr fixed | 3.89% | 3.88% | |
| 15 yr fixed | 3.21% | 3.21% | |
| 5/1 ARM | 2.87% | 2.88% | |
| 30 yr refi | 3.96% | 3.96% | |
| 15 yr refi | 3.30% | 3.29% |
Today's featured rates:
| Index | Last | Change | % Change |
|---|---|---|---|
| Dow | 12,801.23 | -89.23 | -0.69% |
| Nasdaq | 2,903.88 | -23.35 | -0.80% |
| S&P 500 | 1,342.64 | -9.31 | -0.69% |
| Treasuries | 1.97 | -0.08 | -3.81% |
| Company | Price | Change | % Change |
|---|---|---|---|
| Bank of America Corp... | 8.07 | -0.11 | -1.34% |
| Cisco Systems Inc | 19.90 | -0.10 | -0.52% |
| Ford Motor Co | 12.44 | -0.25 | -1.97% |
| General Electric Co | 18.88 | -0.26 | -1.33% |
| Microsoft Corp | 30.50 | -0.28 | -0.89% |
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