A final rule issued by the Securities and Exchange Commission regarding third-party due diligence providers and rating services takes effect on June 15. The rule is set to prompt a number of changes in the non-agency mortgage-backed security market, largely targeting transparency. For MBS that receive ratings, public disclosure of results from third-party due diligence reviews will be required before a deal is priced. The disclosure requirement even applies to deals issued as private placements, which is the current practice for jumbo MBS ...