The first-time homebuyer share of home purchases has increased for four consecutive months, according to the latest Campbell/Inside Mortgage Finance HousingPulse Tracking Survey. First-time homebuyer activity tends to increase through the spring homebuying season, but the first-time homebuyer share is at particularly high levels this year. First-time homebuyers accounted for 37.2 percent of home purchases in June, based on a three-month moving average. That was up from a 34.2 percent share in March, and the last time the first-time homebuyer share of home purchases was at 37.2 percent was September 2010. According to real estate agents, first-time buyers appear...