The wholesale-broker market saw a surge in origination volume during the second quarter of 2017, according to a new ranking and analysis by Inside Mortgage Finance. All three primary-market production channels recorded big gains in the second quarter, but mortgage brokers posted the biggest increase, a 35.1 percent jump in first-lien mortgage originations to an estimated $50.0 billion. Most of the top wholesale funders in the sector reported similarly big increases in production. One reason the broker share of originations rose in the second quarter was...[Includes four data tables]