Fannie Mae and Freddie Mac plan to test parts of a common securitization platform under development by year-end, according to an official at the Federal Housing Finance Agency. The FHFA separately announced this week what it deemed to be “significant steps” for the government-sponsored enterprises’ planned CSP. A year-and-a-half after the federal regulator announced the project, the platform remains a nebulous goal that GSE officials hope to make exceedingly encompassing and flexible. Speaking this week at the ABS East conference in Miami sponsored by Information Management Network, Wanda de Leo, deputy director of the FHFA’s office of strategic initiatives, said...