Volume in the home-equity loan market grew significantly last year, with most new loans winding up in lender portfolios, a new Inside Alternative Mortgage analysis reveals. . By nearly any measure, 2005 was a banner year for the home-equity market. On the production side, for instance, volume rose to a record $359 billion, a 12.2 percent jump from 2004’s $329 billion level. … [One data table included]