As refinancing volumes plummet, lenders are trying to extend the home financing boom by pitching adjustable-rate mortgages to borrowers, harkening back to the pre-crisis boom years.

Applications for adjustable-rate loans now make up 6% of mortgage loan requests, up from 3% at the beginning of the year, though still well below the 32% peak in 2004, according to the Mortgage Bankers Association.

Choosing an adjustable-rate mortgage would seem counterintuitive when interest rates are rising. But the spread between average starting rates on hybrid ARMs and 30-year fixed mortgage rates has widened in the past few months, making the ARMs more attractive for borrowers who want to cut their monthly bills. (Hybrid ARMs have rates that are set at a fixed rate for a limited time — typically five or seven years — before resetting higher.)

"Banks are definitely doing more ARMs because they're selling the consumer what they're asking for, which is a lower monthly payment," says Bob Caruso, an executive managing director at Lender Processing Services. "It's like it was several years ago where customers buy the lowest possible payment, not knowing the consequences."

Many borrowers with adjustable-rate mortgages were among the first to default during the downturn. When their rates adjusted after an initial teaser period, they were unable to refinance and got stuck owing sharply higher payments.

This time around will be different, lenders say, because underwriting standards are tougher for hybrid ARMs, so borrowers will be less likely to get squeezed when interest rates reset. Moreover, regulators have all but banned the interest-only and balloon payment features that made ARMs ticking time bombs during the financial crisis.

"The world has changed since 2003 and underwriting standards are much higher," says Cameron Findlay, the chief economist at Discover's home loans division. "You still want to ensure that the consumer has the ability to repay and that we're not setting people up for failure."

Since May, the average fixed rate for a 30-year mortgage has climbed 110 basis points. As a result, the percentage of conventional borrowers eligible to refinance has dropped to 30% from more than 80%, says Scott Buchta, head of fixed-income strategy at Brean Capital.

"The low-hanging fruit is gone, so lenders have to dig a little deeper. They're looking to keep the pipelines full," says Buchta. "Lenders are pushing ARMs right now because so many fixed-rate borrowers are out of the money," meaning they would not significantly cut their expenses by refinancing into a fixed-rate loan.

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