The minimal movement of mortgage rates in these last three weeks reflects the current economic nirvana of a tight labor market, solid economic growth and restrained inflation. As we head into late spring, the demand for purchase credit remains rock solid, which should set us up for another robust summer home sales season. While this year’s higher rates ? up 50 basis points from a year ago ? have put pressure on the budgets of some home shoppers, weak inventory levels are what’s keeping the housing market from a stronger sales pace.