Holdings of first-lien mortgages by banks and thrifts increased in the third quarter, according to an Inside Nonconforming Markets analysis of call reports. Banks and thrifts held $2.07 trillion of first liens in their portfolios at the end of September, up 1.2 percent from June and 4.3 percent from a year ago. The holdings have largely been boosted by jumbo mortgages along with loans eligible for sale to the government-sponsored enterprises ... [Includes one data chart]