During the mortgage crisis, the vast majority of jumbos were adjustable-rate mortgages and hybrid adjustable-rate mortgages, which started at low fixed rates and switched to adjustable interest rates at the end of a set time period typically of five, seven or 10 years, said Keith Gumbinger, vice president at HSH.com, a mortgage-information website.
According to a comprehensive report just released by Democrats on Congress' Joint Economic Committee, 1.8 million hybrid adjustable-rate mortgages will reset within the next two years.