The adjustable-rate mortgage share of total first-lien originations increased in 2017, according to a new ranking and analysis by Inside Nonconforming Markets. While originations of ARMs were essentially flat during the year, total first-lien production declined, boosting ARM share. ARMs accounted for 11.9 percent of total originations in 2017, up from a 10.3 percent share the previous year. An estimated $216.0 billion of ARMs were originated ... [Includes one data chart]