Reports of the death of the interest-only loan market appear exaggerated. In fact, a new Inside Alternative Mortgages analysis shows that the controversial products accounted for a significant portion of the mortgage market’s total business in 2005. An estimated $580 billion of new prime and subprime interest-only loans were originated last year, a total equal to 18.6 percent of the period’s total $3.12 trillion in 1-4 family mortgage production. … [One data table included]