The supply of single-family home loan debt in early 2016 grew for the fourth consecutive quarter to hit $10.008 trillion, its highest level in three and a half years, according to Federal Reserve data released late last week. The first-quarter gain was a modest 0.2 percent from the end of last year, and a 1.5 percent increase from March 2015. But the servicing market is a slow-changing glacier, and steady increases over the past year are another indicator that the mortgage market has largely recovered from the housing recession. Most of the gain came...[Includes two data tables]