JPMorgan Chase added hundreds more to the pool of employees cut by mortgage firms as the industry contends with a collapse in demand.  The bank cut hundreds of more jobs in its mortgage department this week, Bloomberg reported. The layoffs come after the bank’s mortgage-origination volume declined 60 percent last year.  The bank’s headcount reduction didn’t name a specific number, but did include managers. This is at least the second notable cut to JPMorgan’s mortgage