Annie Lu, 30, a nurse practitioner, said she called about refinancing when she heard that the economy was officially in a recession. She and her husband bought their house in Brooklyn about three years ago with a mortgage rate of 6.25 percent. She is hoping to qualify for a rate almost a percentage point lower. “It is good to prepare for the worst, and nobody minds saving as much as we can,” she said.

The Treasury’s consideration of additional efforts to breathe life into the housing market was first reported on The Wall Street Journal’s Web site. People familiar with the Treasury’s plans said that Treasury officials had met with top executives at Fannie and Freddie last week but that neither had been notified that any steps were taken toward putting such a plan into effect. By one account, the new program would be available only to home buyers, not to people who simply want to refinance their existing loan at a lower rate.

But those looking to refinance are already eyeing the lower rates. “Borrowers with reasonably good credit and a home that hasn’t lost too much value are going to find mortgage money plentiful and readily available,” said Brad Blackwell, national sales manager at Wells Fargo Home Mortgage.

As rates drop, more people, in theory, qualify for loans because their monthly principal and interest payments will be lower. But to qualify for the best rates, borrowers need to have impeccable credit — or a credit score of 720 or higher — as well as at least 10 to 20 percent of equity in their homes.

And while experts said they were heartened by the pickup in activity, the overall number of refinancings this year was expected to be only slightly more than a quarter of the volume at the height of the housing boom in 2003.

Image The Lattanzios are not alone in seeing an opportunity: one index of refinancing activity tripled last week. Credit... Tina Fineberg for The New York Times

“It is not going to spike up rapidly or anywhere near as it has in the past because credit is still tight, the economy is still weak and there are fewer people that could refinance now than could before,” said Celia Chen, senior director of housing economics at Moody’s Economy.com. “But the decline in rates will help those that can.”