Refinance lending fueled the growth in mortgage originations during the first quarter of 2015, although new data suggest that the purchase-mortgage sector is taking hold. Mortgage lenders originated an estimated $221.0 billion of refi loans during the first quarter, an increase of 51.4 percent from a revised fourth-quarter production estimate of $146.0 billion. Inside Mortgage Finance refi and purchase-mortgage estimates for all four quarters of 2014 were revised to reflect just first-lien mortgage originations. Refi loans accounted...[Includes three data tables]