Non-agency investors will not support new mortgage-backed securities until lenders and issuers establish stringent standards for originations and securitization, according to industry participants. Youre going to need something to convince people at least in the top tier that their credit risk is pretty low, David Lukach, a partner and head of the U.S. structured finance group at PricewaterhouseCoopers, said at a discussion hosted by the Securities Industry and Financial Markets Association last week. ...