Mortgage lending has gained significant market share in the home-purchase market in recent months due to a pullback by investors, according to the latest Campbell/Inside Mortgage Finance HousingPulse Tracking Survey. The combined market share for current homeowners and first-time homebuyers increased again in August, according to Tom Popik, research director of Campbell Surveys. The two groups accounted for 84.5 percent of the homes purchased in August, based on a three-month moving average ...