The development of the common securitization platform is in the works, but Treasury officials have a slightly different view of its implementation than does the Federal Housing Finance Agency. The FHFA said although progress on building the CSP is continuing, the agency is most focused on moving toward a single security. FHFA Director Mel Watt noted that both of the initiatives are “highly interrelated,” but he made it clear that a single security for the GSEs is a priority for Fannie Mae and Freddie Mac in 2015.