The supply of home-equity loan debt outstanding has been in such a steady decline since 2007 that even the mild revival in new lending has been unable to stop. At the end of June, there was $585.09 billion of HEL debt outstanding, including home-equity lines of credit and closed-end second mortgages. That was down 0.7 percent from March. The vast majority of those loans, some $556.94 billion, were held in portfolio by banks, savings institutions and credit unions. There was...[Includes three data tables]