The Financial Industry Regulatory Authority will begin disseminating information for so-called specified-pool MBS issued by Fannie Mae, Freddie Mac and Ginnie Mae, as well as securities backed by loans with Small Business Administration guarantees. The move is aimed at increasing transparency in specified pools, which represent an estimated 3,500 trades, totaling $18 billion in par value, on an average daily basis. It follows a similar effort by FINRA last year in the to-be-announced market for agency MBS. Transaction data will be circulated...